Implementation of Exchange GetOrder through GRPC for Coinbase (#453)

* fix 440: SubmitOrder and CB-ACCESS-TIMESTAMP value

* removed gctcli executable and added it to gitignore

* implemented GetOrderInfo

* getOrder also has trades attached to an order

* getOrder also has trades attached to an order

* fix 440: SubmitOrder and CB-ACCESS-TIMESTAMP value

* removed gctcli executable and added it to gitignore

* fix 440: SubmitOrder and CB-ACCESS-TIMESTAMP value

* removed gctcli executable and added it to gitignore

* minor

* go lint fixes

* removed clutter

* fixed Amount, Executed Amount, Remaining Amount

* removed default value declarations

* removed useless nil chceck

* iteration rewritten go style from java style

* returning error if GetFills fails

* returning error if GetOrderInfo fails

* ExecutedAmont value is FilledSize

* added TODO to fix asset type

* chnages after merging #446

* range without copy value, using index

* removed useless slice initialisation

* couple of nits from code review

* fix indentation

* Update rpc.proto

Fixes indentation

Co-authored-by: Adrian Gallagher <thrasher@addictionsoftware.com>

exchanges/order/order_types.go

@@ -206,6 +206,7 @@ const (
 	Expired             Status = "EXPIRED"
 	Hidden              Status = "HIDDEN"
 	UnknownStatus       Status = "UNKNOWN"
+	Open                Status = "OPEN"
 )
 
 // Type enforces a standard for order types across the code base

exchanges/order/orders.go

@@ -615,6 +615,8 @@ func StringToOrderStatus(status string) (Status, error) {
 	case strings.EqualFold(status, PartiallyCancelled.String()),
 		strings.EqualFold(status, "partially cancelled"):
 		return PartiallyCancelled, nil
+	case strings.EqualFold(status, Open.String()):
+		return Open, nil
 	case strings.EqualFold(status, Cancelled.String()):
 		return Cancelled, nil
 	case strings.EqualFold(status, PendingCancel.String()),