SWF-2923 : Create pkg-improv branch and update projects versions
Use maven-parent-pom 13-SNAPSHOT
PLF-5894 : Upgrade packaged Apache Tomcat 7.0.42 -> 7.0.53
Don't bundle tomcat7-websocket library that x3 the startup time
http://wiki.apache.org/tomcat/HowTo/FasterStartUp