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Now, adding a media set the project in an unclean state, which avoid
beeing able to close without saving when a media has been loaded without
saving the project afterward.

Fix forward declaration of QXMLStreamReader, breaks on Mac OS; see a discussion here: http://lists.trolltech.com/qt-interest/2008-07/thread00798-0.htmlSigned-off-by: Hugo Beauzée-Luyssen <beauze.h@gmail.com>

Fixed other warnings

It actually delete the removed clip. This is mainly used as a SLOT, therefore, returning something was stupid.

Consistancy: when a clip is removed, use a QUuid. When another action
occured on a clip, use its pointer.

A media that fail to load is automatically removed from the view (as
it's removed from the media container.)
Fixes #4

This also fix a typo/bug when checking if a clip has already been
loaded.

Nothing else is saved, as we now use a QXmlStreamWriter. The file format
has changed.
Using forward declaration for class Media as soon as possible.

As it is a view, it doesn't interact directly with the MediaContainer,
but emit signals, and watches for MediaContainer changes to update
itself, thus (mostly) stopping this permanent mvc pattern rape.

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...

We don't need this anymore as Clip aren't stored in the Library.

This was just some kind of wrapper to the Media::addClip method

QDirModel will soon be outdated, QFileSystemModel is faster, uses its
own thread, and check for filesystem changes by itself.
Also: Removing useless attributes from Library

Removed endless ping-pong between library and import when a media is
imported.

Removed temporary medias from the library

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

There is a const baseClip on each media that correspond to the full media lenth.

All the medias are managed by the library now.

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