statistic and log function
finish basic testing
log and simple setting
log and simple setting--correct a bug on log
debugging
in debuging
 add audio buffer to make sure the response are fast. add 0 paddings before doing fft
 add smooth funcitons. merged in Kaichen's code
 fixed the conflict changes of 0paddings in SPUtil
change parameters but have bug
basic parametes setting according to Prof Zhang, high accuracy
test well
make backspace and clear work again
all keys works fine
used to test accuracy after moving
 final test
before merging JJ's code
add save and load knn, update ui
add .project
Revert "add .project"

This reverts commit ba7f88fb621d882589538fde393e20a0ce99ff71.