MGRS validation was overly restrictive.  Loosened the requirements a bit.
MGRS validation was overly restrictive.  Loosened the requirements a bit.

darinacosta/MapLoom,davisc/MapLoom,darinacosta/MapLoom,terranodo/MapLoom,ROGUE-JCTD/MapLoom,davisc/MapLoom,ROGUE-JCTD/MapLoom,davisc/MapLoom,ROGUE-JCTD/MapLoom,ROGUE-JCTD/MapLoom,darinacosta/MapLoom,darinacosta/MapLoom,davisc/MapLoom,terranodo/MapLoom,terranodo/MapLoom,terranodo/MapLoom