2.2

- Refactored audio I/O to allow sharing a common context between input and output, for those OSes that require this
- Rewritten periodic operation handling to use a "run loop" thingy instead of an ugly loop formerly known as tick thread
- Fixed a bunch of compiler warnings (closes grishka#13)
- Added automake so you no longer need to use the GYP file for standalone builds (closes grishka#43)

2.1.1: a bunch of fixes

- Enabled delay-agnostic AEC on Windows & Linux, it seems to make a difference after all (telegramdesktop/tdesktop#4881)
- Fixed PulseAudio crashes, at least I hope so (closes grishka#42)
- Fixed parsing of floating-point server config values in some locales in Linux

Update OS X project once again