Ensure error boxes are hidden at start
Altered capitalisations for spl_autoloader

Initially I'd capitalised these in line with their class names, but
apparently that only worked because OS X's default filesystem setting is
case-insensitive -- spl's autoloader mechanism lowercases the class name
before passing it to the function to find the file that contains the
class, so even if I registered a different autoloader, I wouldn't be
able to use properly cased class file names.

*grumble*