Add script that should be run periodically to update the index.
  At the moment this will mark movies as deleted if they no longer
  exist on disk, and double check that we still agree with the IMDBID
  that was detected for a movie. (For example if we add a new way of
  detecting the imdbid that wasn't used when the movie was first indexed,
  which may have caused a bad index in the past)

  In future this script will be used to make sure even movies indexed in
  the past can benefit from additional data that will be indexed in the
  future (actors, etc)

Add new hook "removedMovie"

This commit includes a database change.