code cleanup

code cleanup
record length automatic, KKF

If Textfield 1 is NULL, the length of the record signal will be the
length of the send signal.
KKF is now Sint64
KKF should work now
Measurement of "distance" should work now
export not working

export not working
slow working KKF

added slow working KKF
faster KKF, peaks recognition

faster KKF, calculates only the range what is "neccesary" (about 25M)
detects peaks in KKF
pseudo stereo