Implement Logger (#228)

* Added new base logger

* updated example and test configs

* updated exchange helpers restful router & server

* logPath is now passed to the logger to remove dependency on common package

* updated everything besides exchanges to use new logger

* alphapoint to bitmex done

* updated bitmex bitstamp bittrex btcc and also performance changes to logger

* btcmarkets coinbase coinut exmo gateio wrappers updated

* gateio and gemini logger updated

* hitbtc huobi itbit & kraken updated

* All exchanges updatd

* return correct error for disabled websocket

* don't disconnect client on invalid json

* updated router internal logging

* log.Fatal to t.Error for tests

* Changed from fatal to error failure to set maxprocs

* output ANSI codes for everything but windows for now due to lack of windows support

* added error handling to logger and unit tests

* clear wording on print -> log.print

* added benchmark test

* cleaned up import sections

* Updated logger based on PR requests (added default config options on failure/setting errors)

* ah this should fix travici enc config issue

* Load entire config and clear out logging to hopefully fix travisci issue

* wording & test error handling

* fixed formatting issues based on feedback

* fixed formatting issues based on feedback

* changed CheckDir to use mkdirall instead of mkdir and other changes based on feedback

restful_router.go

@@ -2,12 +2,12 @@ package main
 
 import (
 	"fmt"
-	"log"
 	"net/http"
 	"time"
 
 	"github.com/gorilla/mux"
-	"github.com/thrasher-/gocryptotrader/exchanges"
+	exchange "github.com/thrasher-/gocryptotrader/exchanges"
+	log "github.com/thrasher-/gocryptotrader/logger"
 )
 
 // RESTLogger logs the requests internally
@@ -17,7 +17,7 @@ func RESTLogger(inner http.Handler, name string) http.Handler {
 
 		inner.ServeHTTP(w, r)
 
-		log.Printf(
+		log.Debugf(
 			"%s\t%s\t%s\t%s",
 			r.Method,
 			r.RequestURI,