GLM: Visualization

Noticed when looking at gridded GLM data (8km - 5min data/1 min update), had trouble quickly picking out area of high activity.  Given activity wasn't too intense, seemed that activity was a bit muted.

 Opted to go create a rough custom color scheme using warm colors to be able to contrast more against a visible satellite image. Wasn't too concerned with the actual amounts of flash occurring, but mainly trends in relation to other cells. Mainly another SA tool to quickly discern potential problem areas. --Tahoe