More detail dummy data

Added more detail to the dummy data by including a created field as well
as tweaking the body field to introduce more varied text
Fixed data binding bug

Fixed a bug that was causing the message body not to show up in the
request being built to be sent to the server when a user sends a message
Added moment and angular-moment dependencies

Moment gives a wide variety of options to display time in friendly
formats and in a more standardized manner. Angular-moment utilizes
moment and provides easy to use directives allowing moment's
functionality to be used on the front end
Fixed mongoose schema bug

Fixed the issue that was causing the MessageSchema to not recognize the
location coordinates which was resulting in mongo throwing errors
Incorporated data binding bug fix and the new angular-moment directive