add tagging to whiteboard and file apps

www/file/app-file.less

@@ -3,10 +3,12 @@
 @import (once) "../../customize/src/less2/include/markdown.less";
 @import (once) '../../customize/src/less2/include/fileupload.less';
 @import (once) '../../customize/src/less2/include/alertify.less';
+@import (once) '../../customize/src/less2/include/tokenfield.less';
 
 .toolbar_main();
 .fileupload_main();
 .alertify_main();
+.tokenfield_main();
 
 @button-border: 2px;
 

www/file/inner.js

@@ -137,7 +137,8 @@ define([
                             }))
                             .append(common.createButton('forget', true, {}, function () {
                                 // not sure what to do here
-                            }));
+                            }))
+                            .append(common.createButton('hashtag', true));
                             rightsideDisplayed = true;
                         }