[Fix] ACTION_GESTURE_NOTIFY should not trigger video osd.
Merge pull request #2466 from ulion/fix_gesture_notify_action_on_fullscreen

[Fix] ACTION_GESTURE_NOTIFY should not trigger osd.
[Fix] slideshow swipe wrong direction detection.
FIX: [droid] volume up/down not working
Merge pull request #2469 from ulion/fix_slideshow_swipe_wrong_direction

[Fix] slideshow swipe wrong direction detection.
changed, assert(0) is nasty, this could just be a bad audio packet
Merge pull request #2470 from koying/fixdroidvolume

FIX: [droid] volume up/down not working
[osx/ios] - adapted readmes - building python module pil isn't needed anymore (will be handled by unified depends in the future - wip)
depends: fix pil build with zlib

Its "build system" is clueless, so rather than jumping through hoops to help
it find zlib, we'll just assume zlib as a hard dependency
depends: add pil to default depends, and add freetype as a dependency
depends: remove python pil helper scripts and docs, they've been moved to depends
depends: nuke old darwin depends
depends: nuke old android depends
depends: update android docs to point at unified depends
LinuxRendererGL: trigger reset of scaling when entering/leaving fullscreen video
VideoRenderer: add gui setting for threshold when hq scaling is desired