GBitmap Changes:
Added all other formats to gbitmap that we support
gbitmap now supports cubemaps
added converters for all these other formats
added stb_image_resize for extrudemips so we can extrude mipmaps for all other formats
GFXTextureManager
Can now directly make cubemaps and texture arrays based on the GFXTextureProfile
API implementations for all functions that cubemaps and arrays needed
clean up mismatched PROFILE_START+PROFILE_END() that was in/out of the mip packign for loop on the gl side, leaving just the self-cleaning PROFILE_SCOPE(GFXGLTextureObject_copyToBmp); similar to the dx11 side
void GuiGameListMenuCtrl::removeRow(const S32& row); (the GuiGameListMenuCtrl:: bit in the class iteslf is redundant and making linux unhappy)
largely cleanups, though does include glCopyImageSubData for gl revs that support it
TODOS:
1) non glCopyImageSubData for `void GFXGLCubemapArray::copyTo(GFXCubemapArray *pDstCubemap)`
2) while we don't get corruption showing in >0 mips for irradiance maps using the newer code, it nevertheless renders wrong.
not 100% sure if renderdoc is showing blank mips because it expects it due to size, or if we are in fact generating em even though we don't use em in the end for irradiance references.
