tr_gl2.cpp now uses the proper interface for printing errors
tr_gl2.cpp now has function names that make sense
removed old references to GLimp_*
cleaned up prefixes in the Windows platform layer
renamed and documented the core GLimp functions
moved the memset calls out of GLimp_Shutdown
dealing with anisotropic filtering properly and fixed the cvar's range and help
platform extension loading is done through Sys_GL_LoadExtensions
throwing fatal errors is done by the renderer exclusively
removed QGL_Init and QGL_Shutdown
cleaned up glconfig_t
filling up the unused glConfig fields in the renderer for old mods
fixed window restore after minimizing when clicking the task bar or using alt-tab
fixed r_mode 1 on secondary monitors
fixed in_mouse 2 input on secondary monitors
fixed the cursor sometimes staying visible and unclipped when restoring the window
only apply hw gamma ramps where and when needed
fixed the start-up console window staying visible when starting in full-screen
black window background to avoid the white flashes when hw gamma is enabled
use the "premake" tool from the cnq3tools repo with
"--quake3dir=<q3dir>" to generate a VS sln and gcc makefiles
this changeset also removes the "clever" handling of fullscreen/windowed
changes which didn't actually work and just broke windowed mode
