[Gtkradiant] GtkRadiant 1.2.11 release

[Timothee Besset]

nuff said

Given the amount of changes it's likely that we'll get quite some
feedback. We might want a 1.2.12 'soon'.

Otherwise we can start looking at two big items:
# merging the OSX work into Stable-1_2
# merging Stable-1_2 into trunk

Traditionally I do Stable-1_2 -> trunk cause it's all tricky and messy cvs
job and usually breaks stuff. But it needs to be done anyway. OSX merge
should be easy. I think we all want to have a 1.3 beta out 'soon'.

TTimo