Use iadd instead of radd

rsub should have been isub
radd should have been iadd
rdiv should have been idiv
create imul
Merge pull request #6 from olsoneric/vec2_iadd

Use iadd instead of radd
Add Vec3 test for add.
Update status, Vec2 usable
Typos are awesome
Improve comments on getting angle between vecs
Merge branch 'master' into adding_more_vec_tests
Fix missing 'object' for newstyle class
Merge branch 'vec2_newstyle_class' of github.com:olsoneric/pedemath into vec2_newstyle_class