6CYANA: write peaks - CYANA command

Parameters: file=<filename>.peaks          (required)
            format=<string>                (default: <blank>)
            reference
            append

Writes a peak list in Xeasy format (Eccles et al., 1991; Bartels et
al., 1995). Optionally, the output may be appended to an existing file.
By default all peaks are written. Optionally, only the selected peaks
are written.
