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

logger/loggers.go

@@ -0,0 +1,80 @@
+package logger
+
+import (
+	"fmt"
+	"log"
+	"os"
+)
+
+// Info handler takes any input returns unformatted output to infoLogger writer
+func Info(v ...interface{}) {
+	infoLogger.Print(v...)
+}
+
+// Infof handler takes any input infoLogger returns formatted output to infoLogger writer
+func Infof(data string, v ...interface{}) {
+	infoLogger.Printf(data, v...)
+}
+
+// Infoln handler takes any input infoLogger returns formatted output to infoLogger writer
+func Infoln(v ...interface{}) {
+	infoLogger.Println(v...)
+}
+
+// Print aliased to Standard log.Print
+var Print = log.Print
+
+// Printf aliased to Standard log.Printf
+var Printf = log.Printf
+
+// Println aliased to Standard log.Println
+var Println = log.Println
+
+// Debug handler takes any input returns unformatted output to infoLogger writer
+func Debug(v ...interface{}) {
+	debugLogger.Print(v...)
+}
+
+// Debugf handler takes any input infoLogger returns formatted output to infoLogger writer
+func Debugf(data string, v ...interface{}) {
+	debugLogger.Printf(data, v...)
+}
+
+// Debugln handler takes any input infoLogger returns formatted output to infoLogger writer
+func Debugln(v ...interface{}) {
+	debugLogger.Println(v...)
+}
+
+// Warn handler takes any input returns unformatted output to warnLogger writer
+func Warn(v ...interface{}) {
+	warnLogger.Print(v...)
+}
+
+// Warnf handler takes any input returns unformatted output to warnLogger writer
+func Warnf(data string, v ...interface{}) {
+	warnLogger.Printf(data, v...)
+}
+
+// Error handler takes any input returns unformatted output to errorLogger writer
+func Error(v ...interface{}) {
+	errorLogger.Print(v...)
+}
+
+// Errorf handler takes any input returns unformatted output to errorLogger writer
+func Errorf(data string, v ...interface{}) {
+	errorLogger.Printf(data, v...)
+}
+
+// Fatal handler takes any input returns unformatted output to fatalLogger writer
+func Fatal(v ...interface{}) {
+	// Send to Output instead of Fatal to allow us to increase the output depth by 1 to make sure the correct file is displayed
+	fatalLogger.Output(2, fmt.Sprint(v...))
+	os.Exit(1)
+}
+
+// Fatalf handler takes any input returns unformatted output to fatalLogger writer
+func Fatalf(data string, v ...interface{}) {
+	// Send to Output instead of Fatal to allow us to increase the output depth by 1 to make sure the correct file is displayed
+	fatalLogger.Output(2, fmt.Sprintf(data, v...))
+	os.Exit(1)
+}