Media aren't meant to be used anywhere, except when rendering. Clip can
now have subclips, we avoid using uuid when using Clip* is possible.
Correcting remaining crap in MediaListViewController and co.
View handle as many things as possible, but do not touch data.
ImportController doesn't have to do anything with deleting media. That's
the MediaContainer's job.
Probably many other things...

This doesn't restore the functionnality yet.

This breaks almost everything right now, but clean the code soooo
much...
Will be fixed in next commits.

Trying to use Clip* and Clip's UUID everywhere in the code.
This commit breaks a few things.

Every uuid is now located in a clip. To select a media, use its base
clip's uuid.

The previewwidget isn't meant to emit a signal about a clip beeing
added.
Let this to the media, as it holds the clips.

- Extends to 2010.
- Use VideoLAN as new legal entity.

All the medias are managed by the library now.

Signed-off-by: Ludovic Fauvet <etix@l0cal.com>

But the drag and drop is currently disabled

also added forgaotten files

Securing delete media by using removeMedia method that delete the media when at the end of metadata computing