Warzone 2100 Graphic Mods tools

create tags/exp_0.50 from branches/berg-exp

Set up build system with proper params for WZGM project. (if not proper,
at least better)

Set config dir to .warzone2100-wzgm-exp or "Warzone 2100 WZGM-Exp"
depending on platform.

Update: wzencode.py checks for presence of audio files.
added more details to movie_tools/README.

Crushing Textures

Comment out addShieldHitEffect() as it is currently unused.

Change research center models to be those of the models branch.
Disable forcefield hit effects as code is not yet complete.
Update wrf files to reflect changes to model
Update MSVC solution to include new shield.c and shield.h files.

Remove accidentaly commited harmless project file change.

GPL stuff

WRF file changes.

Remove a sharp object from vector.h, also don't convert vector2i_lenght to float unnecessarily.