iOS: Setting up resumable downloads
Merge branch 'master' into wrk/ResumableDownloadsAndBackgroundFetch
iOS: Fix not updating program/episode on childViewController
iOS: Implement background downloads using iOS7 API.
iOS: Fix showing incorrect image while downloading
iOS: Save data when leaving app
iOS: Implement reaction to downloads finishing while app in background. √ Notify user. √ Set app badge icon. √ Update UI