* Mini improvements
* Fix some splits
* Remove last comma from enums
* Fix symbols
* Fix some headers and missing prototypes
* Replace most of f32 with float
* Replace most of Point3d with Vec
* Add missing esprite include with guard
* Add HuSetVecF to ext_math behind a guard
* More includes
* Use proper enum types for vertex attributes descriptions
Positions, normals and texture coordinates are always given in integer
or floating point formats, never as RGB.
Also replace a couple of constants with sizeof().
* Use proper function names when specifying vertex attributes
