RFC: Add OpenXML Import and AbiCollab to installer

Hey folks! Just wanted your opinions on the following:

Since the Windows build is kind of involved (though documented), and
we've got some new stuff coming down the pike that could use testing, I
would like to add the OpenXML import plugin (courtesy of PhilM's Summer
of Code project) and (soon) the AbiCollab plugin (courtesy of my SoC
project and Marc and Martin's hard work) to the Windows installer file.

The primary intent of this is so that the nightly builder (and 2.5.2,
etc) can produce builds with these new components ensuring they are
exposed to testing. If nobody has any objections, I'd like to add the
OpenXML plugin to the installer now, and add AbiCollab as soon as the
Join dialog and TCP backend work. (AKA, when it's functional.)

Thoughts/feelings?

Ryan

-- 
Ryan Pavlik
AbiWord Win32 Platform Maintainer, Art Lead: www.abisource.com
AbiWord Community Outreach Project: www.cleardefinition.com/oss/abi/blog/
"Optimism is the father that leads to achievement."
 -- Helen Keller
"The folder structure in a modern Linux distribution such as Ubuntu
was largely inspired by the original UNIX foundations that were
created by men with large beards and sensible jumpers."
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