Kurt Eckhardt 0257d0473e SPI Transfer(buf, cnt) use FIFO 16 bit Update SPI.transfer(buf, cnt) to use the FIFO queue to speed things up. It also speeds things up to pack the data into 16 bit transfers instead of 8 bits. As this code is more complicated, no longer makes sense to inline it, so functions moved from .h to .cpp files. SPI1 and SPI2 transfer functions were updated as well for T3.5 and T3.6		8 lat temu
examples	Update examples to use transactions	9 lat temu
README.md	Update readme	10 lat temu
SPI.cpp	SPI Transfer(buf, cnt) use FIFO 16 bit	8 lat temu
SPI.h	SPI Transfer(buf, cnt) use FIFO 16 bit	8 lat temu
keywords.txt	Add SPI2 as keyword	8 lat temu
library.properties	Add library.properties	8 lat temu

SPI Library for Teensy