Merge pull request #44 from ksrikanthreddy/master

Added socket.io in the application.
Added footer in addnew contact and chat screen.
Merge pull request #46 from bmadhu/master

Added footer in addnew contact and chat screen.
Added contact number and login number to the communications collection.
Generating communication id when 2 contacts have started chat.
Merge pull request #47 from bmadhu/master

Added contact number and login number to the communications collection.
Transferring chat messages between 2 contacts.
Merge pull request #48 from bmadhu/master

Transferring chat messages between 2 contacts.
Modified the chat controller to avoid jquery usage.