Integrate quantms.io into quantms

[ypriverol]

Currently, quantms exports mzTab, msstats, sdrf and other output formats. After the first release of quantms.io in bioconda #29 we should aim to integrate the library in quantms. Some remarks:

• It must be optional to export to quantms.io because we have already the standard file formats. It will be only available if SDRF is the input format.
• We have to update the project generation file tool, for those analyses in quantms that are not reanalyses of public proteomics data. The project.json must be able to generate without the PX accession information.