websocket daemon scaffold
get topics to subscribe
add a topic exchange octopus
foward octopus messages through websocket
include ask and bid in trade entity
websocket auth & push trade updates to member
add EM.error_handler
error handling for EM.defer
try to fix travis build error
fix trade entity spec
use headers exchange for trade publish
include both orders for self trade
fix EM.defer + activerecord bug
secure websocket for streaming api
Merge branch 'master' into streaming-api

Conflicts:
	Gemfile.lock
Merge branch 'streaming-api'