update version to 3.0.8 in core

engine/src/core/com/jme3/system/JmeVersion.java

@@ -32,5 +32,5 @@
 package com.jme3.system;
 
 public class JmeVersion {
-    public static final String FULL_NAME = "jMonkeyEngine 3.0.7";
+    public static final String FULL_NAME = "jMonkeyEngine 3.0.8";
 }