Few fixes in sync

Handle NoneType for tvdb_id and imdb_id for tv shows (like done for movies).
Default to empty string if tvdb_id, tmdb_id are None, instead of 0.
Change findMovie to use isdigit() instead of > 0.
Add title and year to findMovie, findShow search.
Cleanup traktLoadShows, remove watched array update from initial loop, and move it to 2nd loop, like how traktLoadMovies does it, saw 50% speed improvement (on a fast machine, did not test on other).
Rewrite findInList to use named optional arguments, this allows for multiple fields to be compared now.
Add case sensitive option to findInList, defaults to True.
Fix typo in debug entry.
Merge pull request #99 from nate1280/tv_sync_fix

Few fixes in sync