Added activity for displaying notifications
Using Lists instead of arrays
Added traces and notifications to Response POJO
Changed local IP
Sliding menu in traceactivity for searching users
SlidingMenu library added
Changed return type to Response
Various images added
Layout for users and adding them
Sliding menu layout added
Adapter for notifications and responding to them
Adapter for sending friend requests in a list
Added POJO for friendship entity
Added request for accepting friend requests
Added request for adding friends
Added request for querying users from server
Added activity for displaying notifications