Restored the PollerTest.
Removed category field from Download
Added a Torrent class containing the basic info
Removed health function from Utility and added it to Torrent
Added a class representing the status of a download
ThumbAdapter now uses Torrent items instead of ThumbItems
XMLRPCTorrentManager and Utility now also use Torrent instead of ThumbItem
VideoInfoFragment and PlaybuttonListener refactored
Updated to new Download constructor:
Fixed tests for ThumbAdapter and Torrent
Added toString function
Now all test containing ThumbItem are fixed
Refactored Download class using the Torrent and DownloadStatus classes
Added status field to DownloadStatus
Updated DowloadListAdapter to use new Download class
Updated DownloadActivity to use refactored Download class
Changed function name to include Torrent instead of ThumbItem
Removed test that tested for undefined behaviour(directly canceling a poller after starting it).
Updated XMLRPCDownloadManager to refactored Download class
Updated PlayButtonListener to refactored Download class