v2.1.0

Minor feature release for PYB11Generator.

• We have added better support for operators, with the option of explicitly providing the implementation (via @PYB11implementation) for operators such as __mul__, __add__, etc.
• In such cases there is also a new decorator (@PYB11operator) that should also be added to to such operator overloads.
• Updated the operator list to reflect Python 3 semantics, particularly with the addition of __truediv__ and __floordiv__ rather than the old __div__ operation.

v2.0.3

Patch release for PYB11Generator. Mostly changes to CMake build rules since the last tag/release.