imdb_lookup no longer tries to capitalize non-string errors. fix #2450
Make task abort properties public, for plugins to view.
Make sure email plugin does not email on silent aborts.
Fix a unit test.
Make bittorrent utility return native strings instead of byte strings.
fix #2428
Merge pull request #211 from tubedogg/develop

aria2 Plugin - Bug Fixes
Workaround for tmdb3 bug. refs #2437