Revert "AESinkPULSE: Let Engine handle our volume"

This reverts commit 566e0efb7617bcf78063b6a3ad9ccc4005f39a70.
AESinkPULSE: Restore and sync volume with external programs
AESinkPULSE: Change samplerate to pulseaudioserver rate
AESinkPULSE: return false if device could not be found
Merge pull request #4451 from fritsch/pa-volume-fix-mainline

PulseAudio: Rework Volume
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
renderer: bump buffers to 5
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
X11: ditch SDL for video and window events
X11: Add xbmc icon
X11: add SDL joystick until we have a better solution
X11: factor out code handling device reset notification
X11: move xrandr events to WinEventsX11
xrandr: remove method RestoreState
xrandr: observe orientation
xrandr: allow getting info for multiple screen's

Refactored by: Joakim Plate <elupus@xbmc.org>