AbiWord 2.6.2

# We've enabled the experimental collaboration plugin on the Windows platform. This plugin allows allowing users to collaboratively work on the same document in real-time. The user interface is still a bit rough around the edges, but this will be improved upon in future AbiWord releases.
# Make our presentation plugin work.
# Fix a bunch of small bugs in our XSL-FO, Applix, LaTeX, WML and HTML import/export filters.