Neobuilder

Added

- A class attribute called `__servicer_cls__` to any service interfaces (for
a gRPC build) with reference to that services `GrpcServicer` class
- Added a bunch of useful sub-tests to unittests

Fixed

- A bunch of unittesting issues

Changed

- Moved this entire project over to Github
- Bumped the version in order to not confuse older stuff that doesn't expect
protoplasm to exist in Pypi.org (if we end up migrating this there and
just open-sourcing the whole thing)
- Also in case something changes in the API while migrating, cause I tend
to fiddle with the code and tidy up and refactor when moving stuff