GUACAMOLE-55: Move clipboard functionality to a new guacClipboard directive.

guacamole/src/main/webapp/app/client/templates/client.html

@@ -54,7 +54,7 @@
                     <h3>{{'CLIENT.SECTION_HEADER_CLIPBOARD' | translate}}</h3>
                     <div class="content">
                         <p class="description">{{'CLIENT.HELP_CLIPBOARD' | translate}}</p>
-                        <textarea ng-model="client.clipboardData" rows="10" cols="40" id="clipboard"></textarea>
+                        <guac-clipboard data="client.clipboardData"></guac-clipboard>
                     </div>
                 </div>