Added support for real value signals

com.minres.scviewer.database/src/com/minres/scviewer/database/ISignalChangeReal.java

@@ -0,0 +1,17 @@
+/*******************************************************************************
+ * Copyright (c) 2015 MINRES Technologies GmbH and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     MINRES Technologies GmbH - initial API and implementation
+ *******************************************************************************/
+package com.minres.scviewer.database;
+
+public interface ISignalChangeReal extends ISignalChange{
+
+	public double getValue();
+	
+}