Support for mztab-m #168

The MSMetaEnhancer package currently supports metadata enhancement for mass spectrometry data in formats such as mzML and mzTab. To broaden its applicability and support metabolomics workflows, we propose adding support for the mzTab-M format.

mzTab-M is a standardized tab-delimited format developed by the HUPO-PSI for metabolomics data (https://hupo-psi.github.io/mzTab/2_0-metabolomics-release/mzTab_format_specification_2_0-M_release.html). The format is also described in the accompanying paper (https://pubs.acs.org/doi/10.1021/acs.analchem.8b04310). It allows for the representation of identification and quantification results, metadata, and controlled vocabulary annotations in a structured and interoperable way.

This should be implemented as a new class deriving from Data. Using a python parser for the mztab-m format like https://github.com/lifs-tools/pymzTab-m would be useful. The pymztab-m package though might require some further development.