DMA support for nRF52

nrf52840 can do 32mhz DMA SPI now for very fast display updates! also enabled DMA on CPX and fixed some #defines for SAMD21

Add ability to setSpeed of SPI TFT

also enabled DMA for monster m4sk

1.5.6

Update library.properties

Allow WIDTH and HEIGHT to be mutable

Required for when chips are 320x240 but displays themselves are 240x240

Can separately define X and Y text scaling and anti-alias warning fix

Added option to separately define X and Y text magnification factor thanks to @jonnieZG
Fixed strict-aliasing warning thanks to @grafalex82

Enable SPI DMA by default for PyGamer/PyBadge

1.5.3

bump to speed up arcada

Inline some trivial functions, add byteSwap() for GFXcanvas16

1.5.2

Appease the Travis

Add hooks for SPI data mode

1.5.1

Restore hwspi._mode at the end of all DMA transfers

Moved readcommand8() to GFX Library

Moved the readcommand8() function to the Graphics Library for reading display information.

Fix for fillTriangles on some larger displays

This fixes an overflow issue in some circumstances with fillTriangles()