Merge branch 'filter_audio' of https://github.com/mwuttke97/qTox into filter_audio
Added some `#ifdef QTOX_FILTER_AUDIO`s.
Conflicts:
	qtox.pro

Conflicts:
	src/coreav.cpp
Squashed 'osx/updater/' content from commit a558402

git-subtree-dir: osx/updater
git-subtree-split: a5584021435fc74a1e5da447524b37dcf7311bbc
Merge commit '8934a11dbffce6b0611d97d5748668a5cdb8ba8a' as 'osx/updater'
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Merge branch 'pr939'
minor style tweaks
update the build system
Merge branch 'pr933'
Italian translation: udpate