Importing code to in-game scripts.

I've looked around a bit and it doesn't seem like you can't import code into scripts at the moment. Does anyone know if this is possible?

If not, I would really like to suggest an import system of some kind. It doesn't have to be complicated, just a behind the scene copy paste action. Have a folder somewhere which hold code files and just before compile past the contents of the file where the import command is.

This would greatly help with 2 things, reduce complexity of scripts and more...

Importing code to in-game scripts.