fixes math.Vector2 return types
adds unapply to math.Vector2
adds implicit conversions to math.Vector2
changes package from libgdxscala.math to libgdxs.math
changes file structure to reflect package naming
adds proper return types to math.Vector3 methods
adds implicit conversions and an unapply method to math.Vector3
adds explicit type to method unapply
Merge branch 'math'