ALIVE

Core:

Allow specifying ping interval, thanks to @Cataractar
Connect behind http proxy support, thanks to @dinhoabreu

Protocol:

Updated s40 tokens
Updated android token, thanks to @dedmen
Audio and video receive support, thanks to @aesedepece
Fixed receive presence, thanks to @aesedepece
Get contact's profile picture, thanks to @aesedepece
Handle calls, thanks to @aesedepece
Fixed ack errors, thanks to @aguiraf
Propagate StreamFeaturesProtocolEntity to upper layers, thanks to @ant9000
Fixes to incoming receipt, thanks to @prasselpikachu
Group info v2, thanks to @ant9000
Don't stream error on web notifications, thanks to @aesedepece

Demos:

Fixed keys_get in cli demo, thanks to @tvandergeer
Fixed invite to group in cli demo
Added kick from group in cli demo