Add MJPEG support to the v4l2 access (and simplify the buffer size handling code). I now need people with v4l2 compatible devices with JPEG, DV and MPEG support to try to enable those features.

Don't call input_ChangeState() constantly while being in error state, because it triggers callbacks at each call. This can result in a busy rc interface.

Qt4 - MediaInformation, simplification of the states machine, removal of over-complicated methods. Cleaning and other small fixes.
Please report regressions on that part.

* limit x264 to rev 701 for now and apply our patch taken from branch (r23341 and r23322). additionally, checkout stuff from svn instead of exporting. This makes it easier to track useful revisions for releases

Qt4 - When adding a file to the playlist by clicking on "Read" in the OpenFile dialog, the first time it's ok but the next click you add 2 times and then more times the same file.
Patch from Rémi Duraffort.

Patch by Rémi Duraffort.

Commit from MIT.

* display the GPL in a separate window linked in the About window and the Help menu. Code cleanup (faster and less memory consuming).

Qt4 - Macros removal from menus.hpp... Still some to do. But the biggest are done. Should reduce code size.
Commit from Boston

Value of 0 for width OR height means that we want to keep the original aspect ratio.