cluttter.c
Removing clutter. Using fft.
Layout of parameter file:
Line	Name		Notes
0	nr_win		Number of data windows
1	nr_rep		Total number of subcycles in one integration period
2	nr_pp		Number of samples per subcycle
3	nr_clutter	Number of points to de-clutter
4	notch		Filter width for clutter reduction
				(actual width: 2*notch+1)
			If negative: Use value provided through EROS
5	clutthreads	Number of threads in the calcuclations
6	debug		If >0: Display debugging messages
			If >1: Display more debugging messages
7	nr_lag		No lags to calculate
			If 0: One point in result

Number of lines: 8