[StreamServer API] fallback to the polling mechanism after if connection to the websocket is not established; appropriate fixes in Echo API lib; add test
[Stream, FacePile, Counter] do not show error message in case of error handling from liveUpdates
[StreamServer API] connect to the WS in case of establish connection took more than waitingForConnection time; using fixed number for the waitingForConnection timeout instead of random; using sinon.stub in test case
Merge remote branch 'origin/neurostep/streamserver_api_updates' into rc3.0.16