Kurt Eckhardt cdb4628d85 T4: Support legacy (pre SPI.transaction) methods The code would fail if the user did an SPI.transfer without calling SPI.beginTransaction. So begin now calls beginTransaction with default parameters. Also put in an implemention for SPI.setClockDivider as well as SPI.setDataMode They appear to work OK... Tried to do with out changing any of the current functionality other than to call begin/end transaction in begin to get to a stable state.		5 lat temu
examples	Example setup code bug	7 lat temu
README.md	Update readme	10 lat temu
SPI.cpp	T4: Support legacy (pre SPI.transaction) methods	5 lat temu
SPI.h	T4: Support legacy (pre SPI.transaction) methods	5 lat temu
keywords.txt	Add SPI Buffer functions	7 lat temu
library.properties	Add library.properties	8 lat temu

SPI Library for Teensy