Added
- Badwords, informals, and `words_to_watch` for Chinese.
- Pre-processing to regex matches so that we can have traditional Chinese converted to simplified.
Changed
- Better error logging for `cv_train`.
- Updated language assets for Dutch.
- Added the part for running tests to README.
- Moved tests out of production code.
- Move pytest out of requirements.txt
- Upgrade travis image to xenial.
- Fixed order of imports / isort.