Filib

Remove all TRY instruments from trading in [the foreseeable future](http://www3.oanda.com/v/P0w0C0SYxQ0OJC0q0qCFGV2)

Added
- Visual progress bars.
- Type hints and docstrings.
- Decorator `swap_sign`.
- Helpers `z_score` and `rsi`.

Changed
- Improve Oanda flexibility, see [README](https://github.com/makr3la/filib#usage) for the new workflow.
- Source code color changed to [Black](https://github.com/psf/black).

Fixed
- Several bug fixes. Highly recommended to upgrade to this version.

Changed
- Update dependencies - now only pandas is needed!
- Rearranged source code.

Fixed
- Several bug fixes. Highly recommended to upgrade to this version.

Added
- Select method, see [README](https://github.com/makr3la/filib#2-research) for usage.
Changed
- Unpin and reduce the number of dependencies.
- Portfolio value `target` is now a simpler `leverage` for the portfolio positions.
Fixed
- A large number of bug fixes. Highly recommended to upgrade to this version.

Initial release