Re-implement python client

[blackblitz]

This re-implementation makes the following improvements:

• No dependency on third-party libraries (previously required numpy but now uses array in the standard library)
• Improvements on space efficiency
  • State lookup using bisection search on a lexicographically ordered string (previously used a dictionary)
  • Lazy evaluation of Zawgyi probability
• More stable sigmoid-of-negative function (previously overflowed when passing large positive numbers to exp, which happens with very long Myanmar Unicode input strings)
• Type hints (the src directory is type-checked with mypy in strict mode)
• More concise docstrings as a result of type hints

[blackblitz]

@googlebot I fixed it.

[sffc]

Thanks for the PR!

Travis CI isn't setting commit statuses right now; while we set up an alternative, please check the build status manually:

https://travis-ci.org/github/google/myanmar-tools

There is a build error in the Python build. Can you take a look? Thanks.

[sffc]

Thanks for the changes. This is a good change because it eliminates the numpy dependency. CC @blackblitz, original author of this code; WDYT?

[blackblitz]

Thanks for the changes. This is a good change because it eliminates the numpy dependency. CC @blackblitz, original author of this code; WDYT?

I think it is good. In case you didn't notice, the author of this PR and the original author of the code are the same person.

[sffc]

Great! Let's merge it then. We should release this as version 1.2.1 on PyPI. I will make a PR to bump the version number.

[sffc]

I bumped and tagged the new version directly on the master branch:

https://github.com/google/myanmar-tools/releases/tag/v1.2.1%2Bpy

Uploaded to PyPI:

https://pypi.org/manage/project/myanmartools/release/1.2.1/