this is a fork from dmd2 library by freetronics modified for RG display P10 HUB12, already tested with ESP8266 with softdmd

connection ESP8266 with HUB12 P10 RG Display:

GPIO02	noe  a    GPIO16
	gnd  b    GPIO12	
	-    -
	-    clk  GPIO14
	-    sck  GPIO0
	-    r    GPIO13
	-    g    GPIO04
	-    -