Bitfinex-api-py

-) Added User Settings Write/Read/Delete endpoints (REST)
-) Added Balance Available for Orders/Offers endpoint (REST)
-) Fixed trades error handling (WS)

- Implemented Movement endpoints (REST)
- Fixed unawaited stop
- Changed account's trade execution (te) and trade update (tu) handling

- added ws full orderbook example

- if max_retries == 0 continue forever

- Adds support for websocket events pu, pn and pu

- Adds rest.get_ledgers