Update DB to use PHP MySQLi extensions

class.db.php has been updated to utilise MySQLi extenstions (as I should
be using)
Convert UI to Bootstrap 3, Hack convert to MySQLi

The user interface throughout RadioPanel has been converted to the
basics of Bootstrap rather than trying to create a (horrible) home-made
interface.

class.db.php and various elements throughout have been converted to use
MySQLi equivalent functions, as MySQL should be deprecated (I'm slow)