New logging system (#319)

* First pass at adding new logging system

* NewLogger

* NewLogger

* WIP

* silly bug fix

* :D removed files

* removed old logging interface

* added tests

* added tests

* Started to add new lines to all f calls

* Added subsystem log types

* Logger improvements

* Further performance improvements

* changes to logger and sublogger creation

* Renamed Logging types

* removed old print statement

* changes based on feedback

* moved sublogger types to own file

* :)

* added console as output type

* added get level command

* added get/set log level via grpc command

* added check for output being empty for migration support

* first pass at log rotation

* added log rotation

* :D derp fixed

* added tests

* changes based on feedback

* changed log type

* comments

* renamed file -> fileSettings

* typo fix

* changes based on feedback

* gofmt ran on additional files

* gofmt ran on additional files

exchanges/ticker/ticker_test.go

@@ -10,7 +10,6 @@ import (
 
 	"github.com/thrasher-/gocryptotrader/currency"
 	"github.com/thrasher-/gocryptotrader/exchanges/asset"
-	log "github.com/thrasher-/gocryptotrader/logger"
 )
 
 func TestPriceToString(t *testing.T) {
@@ -351,7 +350,7 @@ func TestProcessTicker(t *testing.T) { // non-appending function to tickers
 			sm.Lock()
 			err = ProcessTicker(newName, &tp, asset.Spot)
 			if err != nil {
-				log.Error(err)
+				t.Error(err)
 				catastrophicFailure = true
 				return
 			}