Fix segfault upon redirection (test url: http://www.youtube.com/v/zl6hNj1uOkY). (& blame pdherbemont!)

Add a few other bunch of FOURCCs (not all tested). Documentation from avformat/riff.c avformat/isom.c, fourcc.org, http://abcavi.kibi.ru/fourcc.php and multimedia.cx. If this is stupid, revert and tell me.

Qt4 - Open Disc Dialog, finish the disc/track-sub/audio handling. Hide, rename, show correctly the buttons. Some other ui fixes.

Qt4 Detection: Use uic-qt4 and moc-qt4 if disponible. Will help ppl that have qt3 and qt4 installed to build VLC.

* rss.c: Test fix for a bug i can't reproduce (most likely due to a missing 0 at the end of string). See http://forum.videolan.org/viewtopic.php?p=112026#112026 for details.

Discard samples before demux is ready
Timeout if no samples received
Header file tidy up

Patch courtesy of Tapio Hiltunen, Technical Research Center of Finland

* removed some dead code and corrected some minor stuff from the previous commits. Thanks for the fixes, Pierre!

Hotkeys: Enable mouse wheel up/down and left/right usage. (mapped respectivly to volume up/down, and position forward/backward). This commit needs review.

memleak in MediaControl_snapshot

Add news about proxy support for MMSH streams (please add these kind of news when you commit the features!)