[lazarus] Organization of units

[Peter Vreman]

> I don't care who does it, as long as it gets done.  Peter, feel free.  I agree we need to rename many of the files and put the DEFINE into the makefile instead of in the interfaces.pp file (or wherever).
I've already added something with TOOLKIT=gtk in the Makefile

> Peter, let me know when you could do it and we'll make sure everything is updated.
Maybe tomorrow/weekend.

Peter