handle busy/full feedback message

commands with startup and completion information changed from
0x11 (= execute immediately + request feedback) to
0x01 (= buffer if neccessary + request reedback)
can return feedback 0x10 = busy/full. This feedback should not resolve
the buffered commands.

src/devices/device.ts

@@ -168,6 +168,7 @@ export class Device extends EventEmitter {
     }
 
     public finish (message: number) {
+        if((message & 0x10) === 0x10) return; // "busy/full"
         this._busy = (message & 0x01) === 0x01;
         while(this._finishedCallbacks.length > Number(this._busy)) {
             const callback = this._finishedCallbacks.shift();