Added dom nodes to let plugins easily inject extra settings.
Added dom nodes to let plugins easily inject extra settings.

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