Update dependencies and remove local-repo directory

 - Spring Security 3.0.5.RELEASE -> 3.2.4.RELEASE
 - Spring Integration 2.0.3.RELEASE -> 2.2.6.RELEASE
 - ActiveMQ 5.1.0 -> 5.7.0
 - Remove local-repo since BlazeDS 4.0.0.14931 and 4.6.0.23207
    are available in Spring repository for third party libraries
 - Update readme