Added `mat4x3_transform`
Added `mat4x3_transform`

Closes https://github.com/PistonDevelopers/hematite/issues/35

fenhl/hematite,PistonDevelopers/hematite,bvssvni/hematite,LeeRisk/hematite,bvssvni/hematite,toqueteos/hematite,tomaka/hematite,toqueteos/hematite,PistonDevelopers/hematite,0x73/hematite,tomaka/hematite,0x73/hematite,LeeRisk/hematite,fenhl/hematite