Fix 9c9a7f: .git file is within gsm subdirectory
Update README: use Markdown and add HomeBrew installation
Fix crash when the received message is invalid UTF8
Prepare for ARM64 compilation and remove loss-precision warnings where possible (possibly incomplete)
Update linphone for more AAC-ELD codecs
Add support for more AAC-ELD frequencies
Use .md extension for README
[Mod]: Build number 2.2.3.18
[Rem]: Email address of linphone developers
[Fix]: How to upgrade macports to support i386 arch
Update README for brew tools
Update linphone
Remove armv7s target, since it is not used anymore by Xcode
Remove isLCReady method and don't remove the core when going into background mode.
This removes a lot of code complexity and makes some strange simulator / device bugs workable (especially the very first start of the app).
Fix discrepancies spotted by analysis
[Rem]: Unused code
[Ref]: Variable and function names are renamed
[Add]: Ability to select domain to login to
Enhance accessibility
Clean some warnings generated by xcode