Remove notification when the bundle is already up to date

Eliminate the minor interruption of notifying the dev when nothing has changed. Leave the UI message in place.
Merge branch 'no-notification-when-up-to-date' of git://github.com/cablegram/guard-bundler into cablegram-no-notification-when-up-to-date

Conflicts:
	spec/guard/bundler_spec.rb