Fix for jansmolders86/mediacenterjs#130

Added call to next if app doesn't handle requested url. So returns 404 when an invalid url is requested.
Add update button to Movie edit dialog

So you can change the title, click update and it search TMDB for the metadata relevant to the new title.
Fix merge issue in movies/index.js
Merge pull request #131 from Jon889/master

Fixes #130