Added a way to invalidate bounding box of a geometry object (to allow changing GLC_Mesh on-the-fly)
Silhouette now always works. The smoothing groups don't need to be related to object ID, but just need to have unique IDs
Fixed debug message spam when setting strange (but correct) rendering distances in orthogonal rendering mode
Merge branch 'next' of https://github.com/laumaya/GLC_lib into next
Fixed minor cross-platform/cross-compiler issues
Merge branch 'next' of https://github.com/PhoenixBlack/GLC_lib into PhoenixBlack-next