We don't need these anymore
Remove some useless doc comments here
recursiveClearObjects() is not needed anymore
Experimental feature: Throw exceptions instead of warnings

API:
Pancake\SetErrorHandling(long $mode[, string $class])

$mode can be either Pancake\EH_NORMAL for default error handling or
Pancake\EH_THROW for exception mode. $class must be a class derived of
Exception, default value is Exception.

When mode is set to EH_THROW, all E_WARNING, E_USER_WARNING and
E_RECOVERABLE_ERROR will automatically be thrown as exceptions.