add webcam viewer

web/app/assets/javascripts/minimal/minimal.js

@@ -18,6 +18,7 @@
 //= require ga
 //= require utils
 //= require playbackControls
+//= require webcam_viewer
 //= require react
 //= require react_ujs
 //= require react-init

web/app/assets/javascripts/react-components/SessionOtherTrack.js.jsx.coffee

@@ -69,7 +69,10 @@ MixerActions = @MixerActions
 
   componentDidMount: () ->
 
-    context.jamClient.SessionSetUserName(this.props.participant.client_id, this.props.name)
+    if this.props.participant.client_id?
+      context.jamClient.SessionSetUserName(this.props.participant.client_id, this.props.name)
+    else
+      logger.error("no participant client ID")
 
     $root = $(this.getDOMNode())
     $mute = $root.find('.track-icon-mute')

web/app/assets/stylesheets/client/react-components/SessionScreen.css.scss

@@ -319,6 +319,10 @@ $session-screen-divider: 1415px;
       text-decoration: none;
       font-size:12px;
       margin-left:5px;
+
+      &:hover {
+        text-decoration:underline;
+      }
     }
   }
 }