aspRoi('save') would fail if ROIs overlapped (#177)
aspRoi('save') would fail if ROIs overlapped (#177)

It sorted frequencies and then tried to match two adjacent
frequencies to a specific ROI. This would fail if ROIs overlapped.
It now just iterates over the ROI list.
OpenVnmrJ/OpenVnmrJ,OpenVnmrJ/OpenVnmrJ,OpenVnmrJ/OpenVnmrJ,OpenVnmrJ/OpenVnmrJ,OpenVnmrJ/OpenVnmrJ,OpenVnmrJ/OpenVnmrJ,OpenVnmrJ/OpenVnmrJ,OpenVnmrJ/OpenVnmrJ,OpenVnmrJ/OpenVnmrJ,OpenVnmrJ/OpenVnmrJ