Automatic FFT uses default settings

[Sugocy]

Everywhere csi_fft or csi_ifft is used, it automagically uses csi_fft(data) without any options specified.

Default behavior means fft with:

• no n-term correction for 1/n in fft algorithm Matlab (which only scales your spectrum)
• apply correction for fft because spectroscopy data uses one-sided fft as per convention
• ignore if echoes are used instead of fids as those data sets require a double shift; this is not even an option in csi_ifft.