Messaging
Added usernames.
Optimized new message check.
Messaging:
Implemented fake realtime messaging.
Added infinite scrolling to community feed.
Fixes Issue #3
LOAD MORE button is replaced with ionic infinite scroll.
Pending iOS testing.
Added footer bar input field for comments.
Added checking of comment.
Fixes issue #2
Merge branch 'development' of https://github.com/DataAnalyticsinStudentHands/VolunteerManagementApp into development