Bump to 0.1.X, to follow the version scheme of main neovim repo.
Changes since 0.0.38:
- 66617ca doc: Add embedding example to readme.
- 0dce6a8 Change supported python3 versions to 3.3-3.5
- d6f2c7a Don't override the encoding of msgpack strings
- e94201f ui: convert byte strings in python3. Fixes #145
