Rewrite AJAX for contact form.
Set default timezone to stop PHP from complaining.

Signed-off-by: Philip Kent <philip.kent@me.com>
Remove SQL from recent-comments (see #61)
Remove SQL from the featured box and fix associated bugs (see #61)
Remove SQL from the most popular box (see #61)
Switch over to using mysqli over mysql (This is to ensure future
compatibility with PHP 5.5).

Upgraded ez_sql to latest version (including mysql driver for those of you
who find bugs with mysqli).
Add modified version of SafeSQL which supports mysqli, and updated
with php 5.4 bugfixes.
Add SafeSQL to the Auth controller

This switches the entire Auth controller into using safesql to secure
the SQL queries that are used. SafeSQL is also made available to all
controllers via BaseController.