Merge pull request #31 from prdatur/master

Updated output plugin: RapidPush
Make rapidpush plugin accept multiple apikeys as a list
Standardize all tvdb entry fields to start with tvdb_
Remove space from between api keys in rapidpush
Fixes RlsLog parsing.

- Results are now google urls, which cannot be used for anything relevant yet.
Add new urlrewriter for google results.
Add new plugin `disable_urlrewriters`.

- This plugin can be used to disable certain urlrewriters,
  thus stopping them being considered as viable urlrewrite result.
Merge branch 'master' of https://github.com/Flexget/Flexget
Bugfix for unconfigured `disable_urlrewriters`.
Some updates to validators to produce better schemas that comply with jsonschema draft 4
Adjustment to --series new_episodes_after to hopefully prevent crash when series or
episode is None.
Update flexget/templates/rss/default.template

Fix rss template for tvdb field name changes.
Add multi-userkey support to pushover plugin
SeriesParser unit tests. PEP8 cleanups.
Pushover API plugin improvements.

multiple userkey support
custom sound support
better error handling
Revert userkeys to userkey, remove excess logging.
Merge pull request #32 from dickoff/pushover-multiuser

Add multi-userkey support to pushover plugin
Don't verbose about skipped db cleanup if not executing tasks (ie. cli commands).
Docstring cleanup.
Argument --reset-plugin alone will now list all known schemas with details.