Rename the file

A: dWorldEditor, not dRegions.
B: Putting things in a WIP folder breaks git. Files should stay in one
folder all their lifetime, with one name. This is so git commits are
properly tracked to the file, rather than only showing one commit 'move
file to release folder' and 0 of the actual commits that went into
working it.
Scrap dRegion scraps

This is dWorldEditor. dRegions goes in a separate file. (Some people
might want dWE but not dR!)
Upgrade permission checks to more than stubs

Nothing final, just so we have basic permissions requirements, so we can
safely test on open servers.
Clean the header

- up the version
- note my existence
- add a permissions help
- change the description to be a bit less of a downer