Castagne v0.5

[panthavma]

• Added the Castagne Editor (config and character)
• Documentation update
• Added more compile time error checking (including types for some functions)
• Added performance tests
• Added compiler optimization (one preparsed script per phase + inlined Call functions)
• Added Castagneur model by https://twitter.com/Nombrao
• Added Castagneur rig and animations
• Implemented castagneur
• Added 2D sprite functionality