Merge pull request #23 from hemant24/master

Workspace Issue - Resolved
minor ui changes
server side code for starred functionality
modified sample data for conversations
added api to get starred nodes
fixed javascript tree issue
server side implementation for Tags/Labels
Server side implementation for activity log
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/main/java/com/restfiddle/sample/data/SampleDataGenerator.java
	src/main/resources/static/js/utils/tree.js