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

cmd/websocket_client/main.go

@@ -42,8 +42,8 @@ type WebsocketEventResponse struct {
 // WebsocketOrderbookTickerRequest is a struct used for ticker and orderbook
 // requests
 type WebsocketOrderbookTickerRequest struct {
-	Exchange  string           `json:"exchangeName"`
-	Currency  string           `json:"currency"`
+	Exchange  string     `json:"exchangeName"`
+	Currency  string     `json:"currency"`
 	AssetType asset.Item `json:"assetType"`
 }