Merge pull request #5 from jlhosman/master

Various additions and updates & Switched to XSLT 2.0
Adding info about XSLT 2.0
adding handling for HTML tables in addition to CALS, as well as a few other elements
Merge pull request #6 from oreillymedia/sarah

Adding handling for HTML tables in addition to CALS
Moving over Sarah's db5to4.xsl and unwrapblocks.xsl from SVN, so they live in the same repo as db2htmlbook.xsl.
Updating README
Merge pull request #8 from oreillymedia/sanders

Consolidating dependencies
Merge remote-tracking branch 'upstream/master'