Discover now provide an entry instead of just a title
emit_series now add meta data within the entry serie_name, serie_season, serie_episode
Added release estimation for tv series
Created a filter plugin for est released, with an helper function called by discover
Change emit_series to output only one title per series with meta data from the episode two syntax is not useful
Added debug information to est_released_series
Static Cache for api_tvrage in order to speed up multiple query for the same TV Show
estimate_released plugin for movies
Added an interval parameter : for each entry provided by entry an internal interval is created so the same entry won't be search before next interval.
est_released : Renamed function and accept only one entry + fix to the filter + return estimate date of release
discover: added a configuration entry so the estimate function can be disabled
est_released_movies / series : return estimated date of released for the entry
Est_released now returns only the estimated date of release for the movies, leaving other plugins to decide what to do with it.
Simplifications and correction from comments (est_released is no longer a plugins)
Changed from simple_persistence to a Base
Discover refactoring mayhem.

- Various tweaks and fixes
Fix estimator loop, consider rest plugins as well.
Discover refactoring

- Reduced logging
- Emit series does now 1x01 format
Compatibility fix for some search plugins with the new discover refactor
Added a log when movie is not available yet.
Merge branch 'discover_refactor' of https://github.com/Flexget/Flexget into discover_refactor

Conflicts:
	flexget/plugins/input/discover.py
	flexget/plugins/urlrewrite_torrentz.py
Fixed a "normal" exception in the log that may raise unnecessary questions
pep8 spaces
Merge branch 'master' of https://github.com/Flexget/Flexget into discover_refactor
Add index for title and task on discover table
Make discover release entries that no estimate could be found