Beginnings of epub.xsl stylesheet.
More work on epub.xsl
Merge pull request #51 from oreillymedia/xmlschema

Updated Schema and samples to use @data-type instead of @class
Merge branch 'master' of github.com:oreillymedia/HTMLBook into htmlbook-xsl
Updated common stylesheet and corresponding params to do semantic logic based on @data-type instead of @class.
Updated xrefgen stylesheet and corresponding params to do semantic logic based on @data-type instead of @class.
Updated idgen stylesheet to do semantic logic based on @data-type instead of @class.
Updated master htmlbook stylesheet to do semantic logic based on @data-type instead of @class.
Updated indexgen stylesheet to do semantic logic based on @data-type instead of @class.
Updated tocgen stylesheet to do semantic logic based on @data-type instead of @class.
Updated chunk stylesheet to do semantic logic based on @data-type instead of @class.
Fixed bug where "appendix" data-type was missing from semantic.name template.
Tweak to default labeling param for chapter.
Bug fix for TOC title generation.
Better handling of $label.and.title.separator generation for TOC entry labels: do not generate the separator if label is empty.
Added poster.png
Markdown samples
Merge pull request #52 from oreillymedia/markdown

Adding some Markdown samples
Updated file references in README
Merge branch 'master' of github.com:oreillymedia/HTMLBook into htmlbook-xsl