Changed API to correspond to Bake 0.6. Note: we skipped py-bake 0.5 to match Bake's version.

Update to setup.py to better find pybind11 headers.

Adapted API to Bake 0.4.

Adapted to latest Bake API (post 0.3)

Corrected the way PyBake looks for the PyBind11 dependency.

Satisfies new Bake API.