ffmpeg: add osx fix, bump to 2.2.2
[osx] Support planar audio devices in the core audio sink.
[cosmetics] indenting
Merge pull request #4712 from jmarshallnz/ca_planar

[osx] support planar audio devices in core audio OSX sink
[addons] set Gotham repo to minimal 13.0.0 version
[addons] add Helix repo
Merge pull request #4721 from MartijnKaijser/helix_repo

Helix repo
[win32] clean up win32 installer
Merge pull request #4644 from MartijnKaijser/cleaninstall

[win32] clean up win32 installer
Merge pull request #4698 from FernetMenta/ffmpeg

ffmpeg: add osx fix and bump to 2.2.2
[osx/ffmpeg] disable spew of sdl compile/link flags
Merge pull request #4692 from Memphiz/fix-disabled-ffplay

[osx/ffmpeg] disable spew of sdl compile/link flags