Added common features image and documentation.
Added common features image and documentation.

carlos-reynosa/magento-html5-webrtc-customer-service-module,carlos-reynosa/magento-html5-webrtc-customer-service-module,carlos-reynosa/magento-html5-webrtc-customer-service-module,carlos-reynosa/magento-html5-webrtc-customer-service-module,carlos-reynosa/magento-html5-webrtc-customer-service-module