Spec2nii

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- Handle FID sequence in twix converter.
- Code lint updates
- Updated versioneer.

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- Updated citation information with publication of NIfTI-MRS paper.
- Updated README information.
- Added check that file had been written successfully.
- Minor under the hood changes

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- Add tests for previous Siemens SOP UID DICOM types from VB line scanners.
- Fixed bug in Siemens RDA header read. Still no orientation tests for RDA format.
- Siemens VX line dicom files will now sum arrays of TE values.
- Added better ID of the Siemens implementation of the standardised SLASER sequence (as DICOM).
- Added provisional support for the GE slaser_cni sequence.
- Added handling of LCModel RAW files lacking header information.
- Included code and spelling fixes kindly contributed by Dimitri Papadopoulos

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- Fix GE p file incorrect TR and TE. Were expressed in microseconds.

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- Improved handling of Siemens DICOM files. Now explicitly handle Siemens Syngo Non Image Storage or MRSpectroscopyStorage DICOM types, regardless of scanner baseline.

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- Improved handling of Philips enhanced DICOM
- WIP handling of Philips classic DICOM, more test data required.
- SPAR/SDAT Philips data can now be reshaped ont eh command line using the -s and -t commands.
- Corrected phase convention for Siemens NumarisX (XA) line DICOM data. This was reversed (conjugated) compared to VX line.