Plane: Getters and classic planes
Sphere: Getter
Vector2: Angle between two vectors
Vector3: Same in 3D
Former-commit-id: 07e6421def813743e5fd8248fe2e9503cebbb8a8
Updated copyright year (Yay, 515 file updated)
Regenerated global headers
Fixed some typo
Improved some shaders
-Blah blah blah-
Thank you all for supporting my project !
-Lynix
Former-commit-id: e4e741b318ba4f203da5ffd265bd5e516e7ffd7d