Max set columns depending on set type.
Less strict monospaced().
Added SQR() macro.
Include cups/ppd.h.
ssd_set_indexed() should fail if there are not data columns or the first column is non-numeric.
Use project_get_ncolors() instead of Canvas's number_of_colors() in set_set_colors().
Implemented convolution with Gaussian or Lorentzian in addition to
that with another set.
Double zero FFT component when halflen = true.
In GetTransformDialogSettings(), create index data column if it does not exist.
Switched to FFTW-3.