Inserted missing file header

Author: Johannes Duesing

src/main/scala/de/upb/cs/swt/delphi/instancemanagement/InstanceLink.scala

@@ -1,3 +1,18 @@
+// Copyright (C) 2018 The Delphi Team.
+// See the LICENCE file distributed with this work for additional
+// information regarding copyright ownership.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
 package de.upb.cs.swt.delphi.instancemanagement
 
 import LinkEnums.LinkState