[Gtkradiant] GtkR 1.3.8-beta release candidate

[Timothee Besset]

Uploading a release candidate to
http://zerowing.idsoftware.com/nightly/GtkRadiantSetup-1.3.8-beta.exe

Not much new in this release really, mostly an interim release before 
looking at Gtk2 stuff.

  Dan Olofson & TTimo
  - fix for buggy ATI drivers. Likely this doesn't fix all ATI issues, 
but fixes a rendering bug related to polygon backfaces
    the workaround has to be enabled in Edit > Preferences, in 2D 
display/rendering tree node
  Riant
  - fix to png textures not showing in SoF2 mode. was a bad config file

I am leaving this file on zerowing for a bit till you potentially have 
time to download and verify it before rolling it out officially.

As far as Q1 support .. LordHavoc's code so far is in. There is no game 
pack as such, and we are missing bug 800 still.

Other stuff: ET support .. opened a bug/todo item. Should be mostly a 
matter of putting together the setup in gamepack.

TTimo