fix history & specials

* PEP8 fixes, cleanup parse name like we do everywhere else. 
* Due to previous bugs, cleanup and restore data where we can.
  * Reset specials back to skipped (some were set to wanted automatically).
  * Sanitize episode release_name off snatched history data (undo data thrown away by re-scan process).
  * Sanitize all release group data in the history (cleanup RP/NZBGeek/Repost).