V20 Timeout

[sameerk-k]

Received this error running tests against the Oanda practise env. The error was encountered after several hours of running successfully.

File "/Applications/anaconda/lib/python3.6/site-packages/btoandav20/feeds/oandav20feed.py", line 286, in _load
if 'code' in msg:
TypeError: argument of type 'V20Timeout' is not iterable

[happydasch]

At the moment, i won't be able to fix this issue, since this is a bigger thing. The way the streaming works at the moment, it is not possible to restore the connection, i believe.

I will move the error to store instead of being passed to data feed.

[happydasch]

Added settings to store to set timeouts for api poll and stream requests. Set them to None to disable timeouts or to a higher value than the default.

stream_timeout=None,
poll_timeout=none,