videoplayer: adapt lateness detection and dropping to buffering
video player: present correct pts to user for a/v sync (after buffering in renderer)
videoplayer: some rework and documentation
Revert "dvdplayer: disable buffering unit dropping is improves"

This reverts commit de1caf5686c1fb53cb7ab11b356e6c22770740db.
configure: add --enable-pvraddons-with-dependencies switch
for intree building of PVR Addons
videoplayer: update frametime, it might change due to fps detection
videoplayer: give streams with invalid fps a chance for fps detection
dvdplayer: allow rewinding at end of stream, do a seek after rewind
vdpau: redesign
vdpau: make interop gl default and remove setting, rename and intvert interop yuv
vdpau: drop studio level conversion
vdpau: observe ffmpeg tags for color space
vdpau: switch off de-interlacing on ff
vdpau: fix mp4 part2 decoding, activate by default
vdpau: re-add limited range conversion
linuxrenderer: drop method RenderMultiPass
linuxrenderer: implement progressive weave for vdpau
X11: ditch SDL for video and window events
X11: Add xbmc icon
X11: add SDL joystick until we have a better solution