mk20dx128.ld: attempt to add .eeprom section
merge with Triffid/Teacup_Firmware/Gen7
dda.c and dda_queue.c: replace SREG/cli/sei
README: add note on teensy3.0 development branch
README, Makefile-teensy3: Note differences for ARM compilation
Clean out some compiler warnings
Makefile-teensy3: clean up spurious generation of .d files
mendel.c,arduino_teensy3.h,analog_ARM.c: Enable ADC interrupt service
heater.c: enable PWM on pwm pins
heater.c: expand 8-bit PWM value to full range of PWM
README: Note that ADC+PID+PWM now works
config.teensy3.h: Add breadboard test circuitry notes for 3.3V interfacing
README: Note that EECONFIG and USE_INTERNAL_PULLUPS need work.
Stuff lost / left over after rebasing the teensy3 branch.