Kurt Eckhardt 495ae756f5 T4.x Implement SPI.end() The end method was a nop until now. Now have it stop the SPI operations, plus sets the MISO, MOSI. SCK pins into INPUT_DISABLE mode.		4 lat temu
examples	Example setup code bug	7 lat temu
README.md	Update readme	10 lat temu
SPI.cpp	T4.x Implement SPI.end()	4 lat temu
SPI.h	T4.1 make SPI CS pins be index not mask, plus Franks change to timing	4 lat temu
keywords.txt	Add SPI Buffer functions	7 lat temu
library.properties	Add library.properties	8 lat temu

SPI Library for Teensy