Prepare release 6.14.0

Prepare release 6.13.1

Prepare release 6.13.0

Prepare release 6.12.1

Prepare release 6.12.0

Prepare release 6.11.1

lib/WebRtcPeer.js: Run jsbeautifier

Command:
    npm install
    node_modules/.bin/grunt jsbeautifier

Prepare release 6.10.0

Prepare release 6.9.0

Prepare release 6.8.0