Added Regolith for 0.90

Karbonite now requires this rather than ORSX.

@BobPalmer's other mods may also depend on Regolith where they
previously used ORSX, but since it's past 4am localtime I'll leave them
to one of our more wakeful indexers. :)

Also many thanks to @DuoDex, who atually did most of the work here in
Merge pull request #188 from pjf/regolith

Added Regolith for 0.90