Merge pull request #238 from thisirs/short

Add url rewriter for shortened urls
Merge pull request #246 from thisirs/eztv

Use requests from task in eztv rewriter
Series parser will not override passed in quality.
Fixes assume_quality plugin with series plugin
Allow negative interval
Make series available from an episode
Add upcoming_episodes plugin
Add upcoming_episodes_org-mode.template to be used with upcoming_episodes