adding initial python implementation of coinigy WebSocket api

[ezredd]

• tested with python 2.7.6
• coinigy API key and secret are required on the first run (need to edit the file) then the coinigy.token file will provide authentication for subsequent runs
• example runs

python coinigy_ws.py --help python coinigy_ws.py --orders ORDER-OK--BTC--CNY python coinigy_ws.py --trades TRADE-OK--BTC--CNY