Move MEMBER class to use autoloading
Move postcode functions to autoloadable utility class
Move Gaze to the Utility namespace (for consistency)
Move constituency functions to autoloadable utility class
Fix case of Utility folder

Travis is particularly caring of the case of folders, even though PHP
doesn't care (and will be happy with all commits to this point anyway)
Move calendar functions to autoloadable utility class
Move alert utility functions to autoloadable utility class
Move ALERT class to use autoloading
Move URL class to use autoloading
Extract the THEUSER class and make it autoloadable
Move USER class to use autoloading
Move SEARCHLOG class to use autoloading
Move search engine utility functions to autoloadable utility class.
Move SEARCHENGINE class to use autoloading.

Leave searchengine.php file in place to provide initialisation.
Move TRACKBACK class to use autoloading
Move COMMENT class to use autoloading
Move dbtypes.php loading to init.php

`dbtypes.php` was included at the top of `commentlist.php`, which is
included in `init.php`, so it can be safely removed as part of class
autoloading refactoring (`dbtypes.php` would *always* be loaded as part
of `init.php`'s includes anyway)
Move COMMENTLIST class to use autoloading
Move RedirectException class to use autoloading
Extract HANSARDLIST class to use autoloading

* Reintegrates the new Hansard class with HansardList
* Moves around definitions in hansardlist.php to solve ordering issue