SPIFIFO - Interface for fast SPI usage!
SPIFIFO support for any CS pins
Minor SPIFIFO tweaks
Minor DPIFIFO tweaks
Merge pull request #1 from xxxajk/master

Add missing _P versions of printf family
Add printf for Teensy2
Add printf for Teensy3
Merge pull request #2 from xxxajk/master

Fix errors in _P macros using elipses
Add missing AVR eeprom functions
Support for Teensy 3.1