Added comments to Window and main
Added comments to VertexObjec and Drawable
Added comments to Line, Triangle, Square and PrimitivePar
Readded GLM_FORCE_RADIANS to avoid pragma warnings

Angles in Chain are now saved in radians
Added comments to Bone and Chain
Optimized calls to glUseProgram

Instead of once per frame, glUseProgram is now call only on
intialisation
Added change chain position on mouse click example code
Move glDeleteProgram from Renderer to Window