Enemy Territory: Quake Wars SDK v1.2 beta r2

* editWorld fixes: Added Create Brush dialog to allow for precise sizing and positioning of new brushes
* Removed do-nothing "Subtract" entry from the CSG menu
* Merged duplicate Camera menu entries in the View Menu
* Fixed camera window flickering/not drawing properly
* Fixed preferences not loading in some cases
* Fixed initial locations of Z and YZ windows
* Fixed sorting of filenames with different extensions in the file browser
* Fixed compiler crashing if there was no worldspawn
* Fixed manually entering patch subdivisions not updating the patch

* General changes: Added a few additional models to the model_gallery world
* Added support for (and generated) a blacklist for materials, atmospheres, etc. so that they don't clutter up the media browsers
* Merged MegaBuild with the SDK Launcher
* Fixed warnings when compiling generated scripts
* Fixed generated scripts not copying all necessary files to fs_savepath