#153 Personalized hacks

It'd be nice to have the possibility of adding hacks
without editting some core files.

I mean, let's say you want to add a function on
functions.php. Instead of adding then on functions.php
you add them on a personal_functions.php that's
included on functions.php. This way, even though
functions.php is updated, you wouldn't have to hack it
again even though a new version is released.