FIX: [stereoscopic] fix 3D support for libstagefright and ios
Merge pull request #3887 from koying/fix3droidios

FIX: [stereoscopic] fix 3D support for libstagefright and ios
changed: don't start the screen saver when minimized. Prevents the start of the ss when maximizing and an endless loop with some ss.
Merge pull request #3893 from wsoltys/screensaverfix

changed: don't start the screen saver when minimized.
[ios] - enable retina support for iPadAir and iPadMini2G
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>