firmware source moved into subdirectory

diff --git a/Makefile b/firmware/Makefile
similarity index 100%
rename from Makefile
rename to firmware/Makefile

diff --git a/adc.c b/firmware/adc.c
similarity index 100%
rename from adc.c
rename to firmware/adc.c

diff --git a/ambient.c b/firmware/ambient.c
similarity index 100%
rename from ambient.c
rename to firmware/ambient.c

diff --git a/buttons.c b/firmware/buttons.c
similarity index 100%
rename from buttons.c
rename to firmware/buttons.c

diff --git a/gpio.c b/firmware/gpio.c
similarity index 100%
rename from gpio.c
rename to firmware/gpio.c

diff --git a/lights.h b/firmware/lights.h
similarity index 100%
rename from lights.h
rename to firmware/lights.h

diff --git a/logging.c b/firmware/logging.c
similarity index 100%
rename from logging.c
rename to firmware/logging.c

diff --git a/main.c b/firmware/main.c
similarity index 100%
rename from main.c
rename to firmware/main.c

diff --git a/pattern.c b/firmware/pattern.c
similarity index 100%
rename from pattern.c
rename to firmware/pattern.c

diff --git a/pwm.c b/firmware/pwm.c
similarity index 100%
rename from pwm.c
rename to firmware/pwm.c

diff --git a/pwmled.c b/firmware/pwmled.c
similarity index 100%
rename from pwmled.c
rename to firmware/pwmled.c

diff --git a/tmr.c b/firmware/tmr.c
similarity index 100%
rename from tmr.c
rename to firmware/tmr.c