Bugfixes: Bitfinex websocket, ZB market response and portfolio (#397)

* bug fix for websocket orderbook processing

* Fix more panics

* fix linter issue

* kick panic can down the road

* temp fix for issue with a 404 returned error as chainz.cryptoid dropped eth support

* Address nits and fixed orderbook updating

* Fix trade data, rm'd event time from struct

* fix time conversion for huobi

* Actually process kline data and fix time stamps

* btse time conversion fix and RM log, as it seems that the gain is reflecting transaction side. Drop ticker fetching support because there does not seem to be support on docs. And added trade fetching support.

* revert huobi println

* Adressed suggestion

* rm unnecessary assignment

* rm unnecessary check and assign

* fix conversion mishap

* fix currency conversion bug

* update websocket logging

* RM websocket type which stops conversion and copy

* fix linter issue, add in unknown side type

exchanges/order/order_types.go

@@ -100,11 +100,12 @@ type Side string
 
 // Order side types
 const (
-	AnySide Side = "ANY"
-	Buy     Side = "BUY"
-	Sell    Side = "SELL"
-	Bid     Side = "BID"
-	Ask     Side = "ASK"
+	AnySide     Side = "ANY"
+	Buy         Side = "BUY"
+	Sell        Side = "SELL"
+	Bid         Side = "BID"
+	Ask         Side = "ASK"
+	SideUnknown Side = "SIDEUNKNOWN"
 )
 
 // Detail holds order detail data