TweakedJimMartin

Slightly tweaked JimMartin color table for GRlevel3, this one is a bit more sensitive to lighter reflectivity values.  If you have a link to the original, please find me in the facebook GRlevelx Users group and send me a message so I can give credit for the original work here.

11/16/22: Steps tweaked from 5 to 10 to repair discrepancies across color tables on developer end.