TTimo/GtkRadiant — pull request #183 by jdolan (2013-06-27 22:27:02+00:00)
Title: Mac packaging

Also:
* Adds support for GDK_GL_LIBGL_PATH so that we open the same libGL as GtkGlExt.
* Fixes a crash on Mac when GL_EXTENSIONS fails to resolve.
* Fixes 64 bit q3map2 variable visibility which was breaking Mac / Linux compile.
* Removes Q2WPack install hacks per our discussion.