UP-3876: Update jQuery, jQuery-UI, Backbone, Underscore and others javascripts libs used by universality and muniversality skins

- Update jQuery, jQuery-UI, Backbone, Underscore and others javascripts libs used by universality and muniversality skins
- Update fluid in order it supports jQuery 1.8.X : this commits require an update of resource-server : RESSERV-51 (https://issues.jasig.org/browse/RESSERV-51)