Includer

Alright.

The Builder has lost all power to write files, instead it is one of two generators. The other is the Includer.

Both of them yields a destination and the bytes (not a string) of what is suppose to be written.

I think I need to clean the Builder a little, as the rewrite left it a little rough along the edges.

Also, the list of things plugins have to deal with in the register function is getting a little out of hand. I think an alternative solution might be in order.