[ooo-build] Wiki pages update

[Jan Holesovsky]

Hi,

I found out that our Wiki pages were a bit incomplete, as a starting point for 
the GSoC students; so I (with Kohei's help) updated most of that to fit the 
current needs.  The students should be able to bootstrap in an hour or two 
[including downloading ;-)] without heavy googling now.

http://www.freedesktop.org/wiki/Software/ooo-build/

Please go through that, and update the pages if you see anything 
missing/incorrect/outdated.  Please note that the Wiki page login is not 
related to your fd.o account you use for git ;-)

Thank you,
Kendy