Presence subscription v1
- subscribe and unsubscribe presence
- show presence status (support current page only)
revise code for handling URL navigation in roster
revise URL for update and delete in roster
Minor code change in roster
Revise code to maintain Roster in Mongo DB
Revise coding of subscribe and unsubscribe URL in coffeescript style
Minor fix to update icon after unsubscribe action
Revise coding on handling presence event
Accept and Deny incoming subscription request
revise to coffeescript syntax for accept and deny subscription API
Incoming message alert in roster
merge with master
update API in readme
Merge master branch with 02roster(02roster_201412221700) branch