Use stable version of Wicket

wicket/pom.xml

@@ -21,10 +21,10 @@
 	</licenses>
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<wicket.version>6.15.0-SNAPSHOT</wicket.version>
+		<wicket.version>6.15.0</wicket.version>
 		<jetty.version>8.1.14.v20131031</jetty.version>
 		<bonecp.version>0.8.0.RELEASE</bonecp.version>
-		<slf4j.version>1.7.6</slf4j.version>
+		<slf4j.version>1.7.7</slf4j.version>
 	</properties>
 	<dependencies>
 		<!--  WICKET DEPENDENCIES -->