%% The LaTeX package tcolorbox - version 2.32 (2013/06/23)
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%% Copyright (c) 2006-2013 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
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(2006-2011): pre publication usage

version 1.00 (2011/12/08): initial public release

version 1.01 (2012/01/26):
- dates amended to \RequirePackage(s)
- provision of the tcolorbox.tds.zip file for easier installation

version 1.02 (2012/02/15)
- documentation language changed from German to English
- small correction of the theorem title line appearance

version 1.10 (2012/03/01)
- tcblatex style for listings changed (nolol added)
- improved hyperref support
- new keys parskip and noparskip
- source code of the documentation added
- new library 'documentation' to support LaTeX documentations
  with several library commands, environments and keys (see documentation)

version 1.20 (2012/03/16)
- new geometry keys:
  'lefttitle', 'leftupper', 'leftlower', 'righttitle', 'rightupper', 'rightlower'
  and implementation changed for 'left' and 'right'
- implementation for tcolorbox changed (adaption to height options)
- new fixed height option keys:
  'natural height', 'height', 'equal height group', 'minimum for equal height group',
  'space', 'space to upper', 'space to lower', 'space to both', 'split',
  'valign', 'valign lower',
  'adjusted title'
- new bounding box option keys:
  'enlarge top by', 'enlarge bottom by', 'enlarge left by', 'enlarge right by',
  'toggle enlargement'
- preparations for a future skin changing option implemented
- commands \brackets and \docAuxCommand added to the documentation library
- documentation rearranged

version 1.30 (2012/04/20)
- several internal code changes to provide a 'skin' exchange mechanism
- new keys for the core package:
  'frame engine', 'interior titled engine', 'interior engine', 'segmentation engine'
  'skin', 'graphical environment', 'geometry nodes', 'colupper', 'collower'
- tcolorbox now defined as 'long' macro
- new keys for the library 'listings':
  'comment', 'listing and comment', 'comment and listing'
- new library 'skins' with the skins
  'standard', 'enhanced', 'freelance', 'bicolor', 'beamer', 'widget'
- keys for the library 'skins':
  'frame style', 'interior style', 'segmentation style'
  'frame code', 'interior titled code', 'interior code', 'segmentation code',
  'colbacklower'

version 2.00 (2013/03/01)
- breaking news: the new library 'breakable' adds breaking support to tcolorbox.
- e-TeX now used instead of calc
- new key 'adjust text' and new implementation for 'adjusted title'
- new geometry keys:
  'toprule', 'toprule at break', 'bottomrule', 'bottomrule at break',
  'leftrule', 'rightrule', 'titlerule', 'outer arc', 'auto outer arc',
  'toptitle', 'bottomtitle'
- new bounding box keys:
  'enlarge top at break by', 'enlarge bottom at break by'
- new overlay keys:
  'overlay', 'no overlay', 'overlay broken', 'overlay unbroken',
  'overlay first', 'overlay middle', 'overlay last',
  'overlay unbroken and first', 'overlay middle and last'
- new key: 'parbox' to change text behaviour
- new library 'breakable' for breakable boxes with the new keys:
  'breakable', 'unbreakable', 'title after break', 'notitle after break',
  'adjusted title after break', 'lines before break', 'shrink break goal'
- new keys for the 'skins' library
  'skin first', 'skin middle', 'skin last', 'title engine', 'pathfirst',
  'pathmiddle', 'pathlast', 'title style', 'title code', 'enhancedfirst',
  'enhancedmiddle', 'enhancedlast', 'enhanced', 'marker', 'bicolor',
  'bicolorfirst', 'bicolormiddle', 'bicolorlast', 'beamer',
  'beamerfirst', 'beamermiddle', 'beamerlast', 'draft', 'freelance', 'standard'
- NOTE: skins 'beamer' and 'widget' changed
  use the new style options 'beamer' and 'widget' to get the old appearance
- new watermark keys:
  'watermark text', 'watermark text on', 'watermark graphics',
  'watermark graphics on', 'watermark tikz', 'watermark tikz on',
  'no watermark', 'watermark opacity', 'watermark color',
  'watermark zoom', 'watermark stretch'

version 2.01 (2013/03/07)
- bug fix: superfluous vertical space for a breakable box which appeared after a page break
- bug fix: height computation error when a broken boxed starts with a segmentation line
- new key for the 'listings' library:
  'listing inputencoding'
- new library 'listingsutf8' as variant of 'listings' with new key
  'listing utf8'
- keys 'toprule at break', 'bottomrule at break',
  'enlarge top at break by', 'enlarge bottom at break by'
  moved from core package to 'breakable' library.
- new keys for the 'breakable' library:
  'topsep at break', 'bottomsep at break', 'pad before break',
  'pad after break', 'pad at break'

version 2.02 (2013/03/13)
- minor bug fix: segmentation line of 'enhanced' now matches 'standard'
- new macro '\tcbox' to draw a colorbox fitted to the content width
- new key 'autoparskip' to detect usage of package parskip automatically
- new key 'nobeforeafter'
- new macro '\tcbline' in the 'skins' library to draw 'just lines'
- new key 'colbacktitle' for the 'skins' library

version 2.10 (2013/04/09)
- bug fix: \tcbox ignored font settings
- outdated documentation in German removed from package
- new core package keys:
  'oversize', 'tcbox raise', 'tcbox raise base',
  'before title', 'after title', 'before upper', 'after upper', 'before lower',
  'after lower', 'center title', 'center upper', 'center lower',
  'tabularx*', 'tabularx', 'tikz upper', 'tikz lower',
  'shrink tight', 'extrude left by', 'extrude right by', 'extrude top by',
  'extrude bottom by', 'extrude by'
- the 'theorems' library now loads 'amsmath'
- new macros for the 'theorems' library:
  '\tcboxmath', '\tcbhighmath'
- new keys for the 'theorems' library:
  'math upper', 'math lower', 'math', 'highlight math', 'highlight math style',
  'ams equation upper', 'ams equation lower', 'ams equation', 'ams equation* upper',
  'ams equation* lower', 'ams equation*', 'ams align upper', 'ams align lower',
  'ams align', 'ams align* upper', 'ams align* lower', 'ams align*',
  'ams gather upper', 'ams gather lower', 'ams gather', 'ams gather* upper',
  'ams gather* lower', 'ams gather*',
  'ams nodisplayskip upper', 'ams nodisplayskip lower', 'ams nodisplayskip'
- new library 'hooks' for hook options with the new keys:
  'before upper app', 'before upper pre', 'after upper app', 'after upper pre',
  'before lower app', 'before lower pre', 'after lower app', 'after lower pre',
  'before title app', 'before title pre', 'after title app', 'after title pre',
  'before app', 'before pre', 'after app', 'after pre',
  'overlay unbroken app', 'overlay unbroken pre', 'overlay first app', 'overlay first pre',
  'overlay middle app', 'overlay middle pre', 'overlay last app', 'overlay last pre',
  'overlay app', 'overlay pre', 'overlay broken app', 'overlay broken pre',
  'overlay unbroken and first app', 'overlay unbroken and first pre',
  'overlay middle and last app', 'overlay middle and last pre',
  'watermark tikz app', 'watermark tikz pre', 'watermark tikz app on', 'watermark tikz pre on',
  'watermark graphics app', 'watermark graphics pre', 'watermark graphics app on', 'watermark graphics pre on',
  'watermark text app', 'watermark text pre', 'watermark text app on', 'watermark text pre on',
  'frame code app', 'frame code pre', 'interior titled code app', 'interior titled code pre',
  'interior code app', 'interior code pre', 'segmentation code app', 'segmentation code pre',
  'title code app', 'title code pre'
- colorization of source code snippets in the documentation

version 2.20 (2013/04/17)
- bug fix: problem with breaking boxes after headings
- new feature: support for boxes with side by side content
- new keys:
  'sidebyside', 'sidebyside align', 'sidebyside gap',
  'lefthand width', 'righthand width', 'lefthand ratio', 'righthand ratio'
- key 'nofloat' documented
- new keys for the 'listings' library:
  'listing side text', 'text side listing'
  'listing outside text', 'text outside listing'
- new keys for the 'skins' library:
  'frame hidden', 'interior hidden', 'segmentation hidden', 'title hidden'
- new environments for the 'documentation' library:
  'dispExample*', 'dispListing*'
- the default style for 'highlight math' is changed to have no title
- minor change of internal width computation
- minor internal fixes
- slight overhaul of the documentation

version 2.21 (2013/04/23)
- bug fix: \tcbox and 'sidebyside' needed 'breakable' library
- bug fix: library 'tcbhooks' relied on etoolbox package
- bug fix: breaking boxes between upper part and box frame
- new macro '\newtcolorbox'
- new macro '\newtcblisting' for the 'listings' library
- new key 'code'
- documentation corrections and extensions

version 2.22 (2013/05/15)
- bug fix: text color bleeded out of the box in some cases
- bug fix: breakable boxes were too large in some cases (leading to blank pages)
- bug fix: breaking boxes produced empty boxes in some cases
- documentation forgot naming package 'colortbl' for the 'tabularx' option
- new feature: breakable boxes allow footnotes now (like minipages)
- new macro '\newtcbox'

version 2.30 (2013/06/04)
- bug fix: handling of 'before' and 'after' for \tcbox corrected
- \tcbline now also works for centered environments
- implementation for \tcbox made more efficient
- new capture mode for automated content fit by font size adjustment
  with the new macros '\tcboxfit' and '\newtcboxfit'
  and the new keys 'fit', 'fit to', 'fit to height', 'fit basedim', 'fit skip',
  'fit maxstep'
- new keys 'baseline', 'capture', 'hbox', 'minipage'
- new stackable borderlines with the 'skins' library:
  'borderline', 'no borderline'
- new keys for the 'skins' library:
  'enhanced standard', 'blank'
- new key 'index format' for the 'documentation' library

version 2.31 (2013/06/18)
- several internal changes
- library loading mechanism revisited
- internal label change for '\tcbmaketheorem'
- new library options 'most' and 'all'
- \tcbline now also works for ragged environments
- new keys:
  'flushleft title', 'flushleft upper', 'flushleft lower',
  'flushright title', 'flushright upper', 'flushright lower'
- new key 'no listing options' for the 'listings' library
- new shadow features for the 'skins' library with the options:
  'shadow', 'fuzzy shadow', 'drop shadow', 'drop fuzzy shadow', 'halo', 'fuzzy halo'
- shadows for the 'beamer' skin changed to fuzzy
- new library 'fitting' for the content fit operations.
  NOTE: '\tcboxfit' and the fit options introduced in version 2.30 are moved
        to this new library
- the fit algorithm is completey revisited and extended
- new macro '\tcbfontsize' ('fitting library') for relative font sizes
- new keys for the 'fitting' library:
  'fit fontsize macros', 'fit height plus', 'fit width plus',
  'fit width from', 'fit height from'

version 2.32 (2013/06/23)
- bug fix: 'ams nodisplayskip lower' was applied to upper.
- new option 'check odd page'
- new environments for the 'skins' library:
  'tcbclipinterior', 'tcbclipframe', 'tcbcliptitle'
- new keys for the 'skins' library:
  'watermark overzoom', 'clip watermark'
  'clip title', 'clip upper', 'clip lower'
- NOTE: watermarks are now clipped by default.
  To get the old behaviour add the option 'clip watermark=false'
