Changed Events from iframe to Google API

Restyled the layout for our events page to improve usability.

This uses the Google API and requires a Google Developer Service Account to work: https://console.developers.google.com/. 

The only thing missing for this to work is the private key expected in /var/ as referenced in the code /events/index.php. I've put this in the trustees dropbox account under 'LHS website api private key'.