Add missing import
Merge branch 'master' of github.com:ksmandersen/CharlesTVDB

* 'master' of github.com:ksmandersen/CharlesTVDB:
  Add missing import
  Revert to bc5682a160038d114e56ecf55f0c2a9cd090c0bd
  Fix: NSDateFormatter is not thread safe. Dismissing use of dispatch_once
  Added airtime aware firstAired dates for episodes