Add Moment.js library for working with date and time

Moment.js is a javascript library for parsing, validating,
manipulating, and formatting dates.

https://github.com/moment/moment/tree/ff32605

Change-Id: I6aa36d34bfbe8334c87d6ca449ec19b6a8daf8e7
Merge "Add Moment.js library for working with date and time"