Trivial PEP-8 change
More PEP-8 fixes
Remove matrix33.apply_scale

It's just matrix33.create_from_scale
Fix syntax error in quaternion.power()

Fix invalid variable usage in quaternion.power.
Remove unused import
Fix matrix33.create_from_quaternion

Was copied from wikipedia and was not row-major format.
Added a test to check for equivalence between matrix
and quaternion operations.
Fix create_from_inverse_of_quaternion

Had a - where it should be a +.
Add a test for this.
Fix inverse for non-unit length quaternions

Inverse was dividing by squared_length, not length.
Added a test for inverse of non-unit length quaternions.
Fix matrix44.create_from_eulers

Was passing extra parameter that no longer exists.
Add a test that runs the function. Need to add a
better test later.
Bump version