BitBang and no Adafruit_GFX#7

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AHorneffer wants to merge 4 commits intomarkruys:mainfrom

AHorneffer:master

Commits on Aug 23, 2016

Included "Panel_No_Adafruit" define to cut connection to the Adafruit_GFX class
AHorneffer
committed

Commits on Dec 15, 2016

Added BitBang_SPI define to do communication without SPI library
AHorneffer
committed

Commits on Oct 22, 2017