Vega Strike Code

Attention Windows users: Do NOT upgrade to this /data revision unless you know a way to compile the engine for windows with cubemaps enabled... --and if you do we'd like to hear about it. This commit commits cubemap versions of all the shader, plus new shaders and techniques (highend_flat, fireglass). It also contains updates to the Agricultural and Diplomatic centers, to use the new shaders, including fireglass, and adding ambient occlusion and shininess. The Mining Base is updated only insofar as its glass bubbles call for the fireglass shader.

more warning fixes + move to vs_dprintf for non-exit error messages

sync with safemode branch -r12610, fix compile error in background.cpp (hopefully) and add verbose_output option to config file analogous to --debug commandline argument, takes same options (master config file already updated in /data, default to off)

Added debug config file option, takes arguments 0,1,2,3 with 0 turning verbose debug off and 3 being most verbose

Add verbose debug config option to config file and allow command line --debug to override it when running vegastrike. Takes same arguments as command-line

Revert non-nv-cubemap change to gfx toggle texture call so it compiles

sync with safemode branch -r12607, added --debug argument and new debug output function, see forum or code change for info ...or --help

merge with trunk -r12605

Add --debug argument to vegastrike, takes priority arguments =1 or =2 or =3 with 3 being the most verbose, see forum post or code for more info

Ok, fixed most of NV_CUBE_MAP issues.
Remains: flipping all "back" background textures along the 45 deg axis.
That is, flip both x and y on all _back textures, to make dds unified cubemaps compatible with 6-file ones.

NOTE: do not comment debugging output, which is useful.
Rather, a proper debugging API should be placed somewhere and all logging should be done with that API, each log message should have a level (debug, info, warning, error), and a config setting should define the desired logging level.