Added Region and methods which take one.
Added Loc.compareTo() for comparatoring.
Make groupId com.samskivert.scaled.

I'll probably switch to a Scaled-specific TLD at some point (maybe
org.scaled-editor or org.scalable-editor), though I don't relish going through
the SonaType shenanigans to get publishing rights for another domain.
Added means for modes to have custom stylesheets.

I still need to sort out user-supplied custom stylesheets (which is likely how
themes will work, you'll just tack one or more stylesheets on over all the
others that themes things how you like). That'll probably be easy once I sort
out user customizations in general.
Mode styles should start with the mode name.

Also brevified the config name, since it's in WhitespaceConfig.
Added a face for the active region.

It's not yet implemented. TODO!
Moved CodeMode back to major, added code faces.