Merge pull request #103 from ndlib/bugfixes_dw

Bugfixes dw - DLTP-52, DLTP-147
Adding Harbinger gem reference
Adding harbinger migrations

$ rake harbinger:install:migrations
Updating schema from harbinger migrations

$ rake db:migrate
Modifying migrations to reflect errors encountered
Tying in Harbinger gem for exception handling

DLTP-123
Appeasing some of the hound
Merge pull request #102 from ndlib/dltp-123-exception-handling

Dltp 123 exception handling
fix whitespace on abstract paragraph for individual pages.
Magic links for urls in the abstract field on individual concern pages.
 Trying this fix again
Merge remote-tracking branch 'origin/bugfixes_dw' into bugfixes_dw

Conflicts:
	app/controllers/application_controller.rb