• Added support for Microsoft Edge browser

Microsoft Edge cannot be made safe by Google Caja, so some portions of the site didn't work properly for Edge users. To work around this, a check for Caja support has been added in. Now, if a browser can't be made safe by Google Caja, then the site still works except that user-generated JavaScript will not be passed to the user. This keeps the user safe by only serving JavaScript when it can be made safe by Caja.