Fix maven-jar-plugin version dependency.

Force to use the maven-jar-plugin 2.4
Fix previous commit for maven-jar-plugin version

ThE previous commit put the version on the wrong place.
First non-working draft
Second non-working draft. But almost there...
A bit refactored, still doesn't work but we have much more info now.
Starts working further refactor needed
reintroducing filters - part 1
Reintroduced Shiro security as Guice injection. Not working yet
Introduced security with shiro WebSecurityManager. Things start to work.