Added XSLTs, rearranged directories

The XSLTs from Steve Lay's qtimigration
(https://code.google.com/p/qtimigration/source/browse/#svn%2Ftrunk%2Fqti
2html) have been tweaked and added. The main difference of my version
with Steve's is migration of the CSS out of the output, which allows
the items to be styled for many purposes.