Update angular and associated dependencies.

- Be explicit about which version of moment.js to use
- Angular 1.3 requires:
  - compulsory use of base tag
  - new syntax for http interceptor
- Latest version of momentjs and angular-moment play well with RequireJS

Signed-off-by: Anurag Priyam <anurag08priyam@gmail.com>
User joining date and submission time now renders fine on all browsers.

The trick was to use ISO string for time.

Renamed column submitted_at to created_at.

Signed-off-by: Anurag Priyam <anurag08priyam@gmail.com>
Store all date & time values in postgres with time zone.

Signed-off-by: Anurag Priyam <anurag08priyam@gmail.com>