Add sleep(1) to tuner task to avoid dump
Add flash LED task
Change data type of fft from float to int16_t
Merge pull request #3 from rtenv-plus-stm32f4/FFT

Change data type and add flash LED task
Merge branch 'tuner' of https://github.com/rtenv-plus-stm32f4/final-project into metronome

Conflicts:
	firmware/tuner.c