Added  Customer Service Admin unique features image and documentation.
Added  Customer Service Admin unique 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