audio_filter2 architecture.

   also fix a memory leak.

   wrong for bpyramid, though).

MacOSX/Framework/VLCMediaListAspect.m: Implement -hierarchicalAspect and -flatAspect. (And add an internal @interface for VLCMediaListAspect (LibVLCBridging)).

contribs: update qt4 TrollTech binaries packaging, note that it won't link correctly when building qt4 interface
explicitely disable building of manuals & documentation of fontconfig

modules/gui/qt4/dialogs/interaction.cpp: In InteractionDialog::update() use a msg_Dbg instead of a wrong msg_Err.

modules/gui/qt4: Display time in seek bar when mouse-over. (Patch by Antoine Lejeune. Reviewed by jb.)

This was blatantly insecure.

modules/gui/qt4: add an update dialog box to the help menu. (Patch by Remi Duraffort. Reviewed by jb).

control/media_descriptor.c: Don't forget to release the event manager. (Reported by polo78 on the forum and funman).