incomplete changes on routing rules drag-and-drop functionality
added grabber image in the drag-and-drop connection routing list
added grabber image in the drag-and-drop connection routing list
unfinished changes to the routing rules
partially finshed Routing rules refactor
90% completed changes on routing rules
completed changes of device routing/routing rules; both UI and backend
a slight modification to hide and show error message on general.gsp
Minor code refactoring on core
Merge branch 'master' into CORE-1908

Conflicts:
	plugins/frontlinesms-core/grails-app/conf/CoreBootStrap.groovy
	plugins/frontlinesms-core/grails-app/i18n/messages.properties
Optimised grabber.png image