[MyVideo] automatic information discovery

Now the MyVideo Database scan the disk and try and find the informations about the movie: but unless you are english it rarely get the right informations (of course, it cannot know the original title by the italian title).
So, maybe it can be a nice addition to let the db editor know the url of the imdb film page.

I mean, when I want to add a new movie:
- I add it to the folder
- I go on IMBD and look for the movie
- I go to movie db, I add a new movie, and I tells him the url (instead of letting mp look for something possible by itself)
- this way it retrieves all the information by itself



much better than having to cut and paste the info into the form.