[Gtkradiant] linux setups / testing information

[Timothee Besset]

There's a linux 1.1-TA-RC2 setup next to the win32 one:
http://www.gtkradiant.com/test/linuxq3sdk-1.1-TA-RC2.x86.run

Some more info about those RC2 builds:

known issues, stuff that will get fixed before release:

- bobtoolz is not included. Mostly because it doesn't compile on linux. It 
will at least be in the win32 setup, but I'm waiting for a sign from djbob.

Some info for testing: you can post back on the GtkRadiant mailing list. 
Also, the bug tracker has moved. Don't use fenris anymore, use 
http://zerowing.idsoftware.com/bugzilla instead.

TTimo