Feature #3687 : new slide show system for Gallery application
- adding gallery REST Web-Services
- adding JavaScript galleria plugin
- centralizing and packaging the notifier JavaScript plugin
- modifying notifier plugin calls in kmelia application
- adding basic dialog popup
bug #4007 :  Now the expired sessions are well closed after a given time out as expected
fixing bug #3924
Merge branch 'feature-3687' of https://github.com/SilverYoCha/Silverpeas-Core into ych-feature3687

Conflicts:
	web-core/src/main/java/com/silverpeas/web/RESTWebService.java
in #memory #fs :  Adding netbeans filesystem for tests
Merge branch 'master' of github.com:Silverpeas/Silverpeas-Core
fixing bug #3553 by :
- fixing silverstatistics cron
- strengthening method which determine size of data directory
- throwing exception when a scheduled job fails
Merge branch 'master' of github.com:Silverpeas/Silverpeas-Core