Rects and smaller improvements

This update adds 2d rects and smaller improvements to how types are checked for generic vectors, quaternions, planes and matrices.

Cleanup

Cleans up a bunch of stuff

v1.0.1

• Vector.opBinary is no longer dot product, but pair-wise multiplication instead
• Removed Vector.opCast!bool - no unexpected implicit casts.
• Added quat.look_rotation

v1.0.0

Full Changelog: https://github.com/Inochi2D/inmath/commits/v1.0.0