Bumped version 2.7.0-SNAPSHOT

Author: thboileau

org.restlet/src/main/java/org/restlet/engine/Engine.java

@@ -95,7 +95,7 @@ public class Engine {
     public static final String MINOR_NUMBER = "7";
 
     /** Release number. */
-    public static final String RELEASE_NUMBER = ".0-m3";
+    public static final String RELEASE_NUMBER = ".0-SNAPSHOT";
 
     /** The org.restlet log level. */
     private static volatile Level restletLogLevel;