[ios] - support iphone6plus screensize which uses screenScale 3 and add
support for iPhone6 screen aswell
[ios] - add launch images for ip6 and ip6+ for enabling the new resolutions
[ios/vtb] - remove the video render scale down / clamp for all retina devices which have enought power to render unscaled
[ios] - add support for iPad Air 2 and iPad mini 3
[ios] - bump gas-preprocessor
[ios] - support Xcode 6.x and iOS 8 SDK

- use clang as default compiler for newer SDKs
- fakeroot: ignore interposing openat()
[ios] - fix libssh build with Xcode 6
[ios] - fix pil build with Xcode 6
[ios] - libRTV fix build for Xcode 6
ios] - fix libmpeg2 build error by making it even more PIC (also the real fix for the xcode5 build issue earlier)
[ios/atv2] - adapt readme - we support Xcode 6.0.1 against iOS 8 SDK
[osx] - adapt readme for compatibility with Xcode 6.1 with OSX SDK 10.10 under Yosemite
[ios/atv2] - adapt the readme for support with Xcode 6.1 against iOS SDK 8.1 on Yosemite
vaapi: workaround intel bugs
[omxplayer] Restore flush/accurate seek flags to fix issue with edl skipping
[PiSink] Dual audio support

The Pi supports dual audio in omxplayer, where the gpu outputs audio to
both hdmi and analogue connections.

With dvdplayer being more usable on Pi now, there are frequent requests
for this functionality through the Pi Sink.

This removes the gui setting for "dual audio" and creates a new sink
output for dual audio. It add support to the Pi sink and makes omxplayer
use the new setting.
Merge pull request #5390 from Memphiz/iphone6

[ios] - support iphone6plus screensize which uses screenScale 3
Merge pull request #5554 from popcornmix/edl_flush

[omxplayer] Restore flush/accurate seek flags to fix issue with edl skip
Merge pull request #5557 from popcornmix/pisink_audio

[PiSink] Dual audio support
vaapi: glIsSync, glIsTexture seem to unreliable on Intel