Added KeyframeList class, including the SkipList, Associative and Ringbuffer classes it depends on.
Fixed Range class.
Minor documentation update.
Implemented Interpolation for KeyframeList.
Extra CMakeLists.txt for all Springbok modules.
Math added Sign and Abs functions.
Minor clean up.
Renamed Core to AssetSystem
Fix only one sound playing at once.
SkipList API changed.
Rewrote ObjectPointer.
New Resource system.
Fix include path.
Top Down Shooter Example update.
White is default color, not black.
Renamed RenderManager to RenderContext, no GetInstance anymore.
Math: Added Round, RoundUp and RoundDown methods.
Implement UTF8Decoder