Display last updated time using time from now

rather than absolute time (ie hour:minute):

  Last updated a few seconds ago

rather than:

  Last updated at 20:34

Use momentjs to automatically handle the time from now string
generation.
Moment.js is freely distributable under the terms of the MIT license.
http://momentjs.com/
Updated to Rufus-Scheduler 3.0 syntax
+ modified gemspec to require rufus-scheduler >= 3.0.0
+ modified scheduler call to use .new instead of previous .start_new syntax
resolved merge conflict
Updated to Rufus-Scheduler 3.0 syntax and rebased
+ modified gemspec to require rufus-scheduler >= 3.0.0
+ modified scheduler call to use .new instead of previous .start_new syntax
Merge remote-tracking branch 'upstream/pr/198'