subscription
email notify on commenting subscribed item.
style fix
dynamic popover creation
email hooks in server
added hook for new work item notification
merge eskim/email_notification

* email_notification:
  added hook for new work item notification
  email hooks in server
  dynamic popover creation
  style fix
  email notify on commenting subscribed item.
  subscription

Conflicts:
	app/client/modal/ideation_show_modal.js