feat(mandrill) - add mandrill service with test

use https://mandrillapp.com/api/docs/messages.nodejs.html#method=send-template

implement send template

closes cw-217.
Merge branch 'develop' of https://github.com/CloudifySource/cloudify-widget-ui into feature/cw-214-support-random-password

Conflicts:
	app/scripts/constants/WidgetConstants.js
Merge pull request #38 from CloudifySource/feature/cw-214-support-random-password

feat(mandrill) - add mandrill service with test