Dostoevsky

Fixed
- Disabled HTTPS cert check that sometimes prevents model download (105)
- Removed non-fasttext code and dependencies (96)

Added
- fastText-based toxic comment model implementation (53)
- Global main module for dostoevsky package, that can be called as python -m dostoevsky

Fixed
- As global main module is available, windows users can call it for models download procedure (52)