Implemented proper leave of aggregated buddies.
Implemented proper leave of aggregated buddies.

shelsonjava/spreed-webrtc,tymiles003/spreed-webrtc,theurere/spreed-webrtc,fancycode/spreed-webrtc,gerzhan/spreed-webrtc,theurere/spreed-webrtc,strukturag/spreed-webrtc,fancycode/spreed-webrtc,gerzhan/spreed-webrtc,strukturag/spreed-webrtc,tymiles003/spreed-webrtc,theurere/spreed-webrtc,strukturag/spreed-webrtc,shelsonjava/spreed-webrtc,fancycode/spreed-webrtc,fancycode/spreed-webrtc,shelsonjava/spreed-webrtc,tymiles003/spreed-webrtc,shelsonjava/spreed-webrtc,shelsonjava/spreed-webrtc,shelsonjava/spreed-webrtc,fancycode/spreed-webrtc,strukturag/spreed-webrtc,theurere/spreed-webrtc,gerzhan/spreed-webrtc,gerzhan/spreed-webrtc,theurere/spreed-webrtc,tymiles003/spreed-webrtc,theurere/spreed-webrtc,gerzhan/spreed-webrtc,gerzhan/spreed-webrtc,fancycode/spreed-webrtc,tymiles003/spreed-webrtc,strukturag/spreed-webrtc,gerzhan/spreed-webrtc,strukturag/spreed-webrtc,shelsonjava/spreed-webrtc