Adding files for string-y magic.
Remove CALL Pre-Processor Define (don't like it)

 To me, in the code, hook_execute makes more sense. Also, not having
CALL and having instead hook_execute means that using hook_execute
is pseudo-deprecated (we don't want to live with hooks, but we should
use them for initialization and deinitialization stuff). I'm not
going to use hooks for things like rendering calculations, but I plan
to do something somewhat similar.