tracegroomer: output options & citation

[johaGL]

Changes are needed for tracegroomer galaxy wrapper:

• update citation
• there is an output file named in the wrapper "corrected isotope abundances" but it is misleading because it corresponds to the metabolite abundances. So, change this name to: total metabolite abundances .
• fix normalization arguments when set to false (argument must have the --no- prefix if user picks false)
  • also verify that normalization default values for args are set as recommended by https://github.com/cbib/TraceGroomer/wiki/4-Advanced-options
• add the option to change the extension of the file names of output files (allow .tsv or .csv , both supported by the source code)

Note: the source code produces always tab delimited files, whether the output file extension is .tsv or .csv (comma delimiter is NOT used, never).

assigned to @johaGL

[johaGL]

waiting for the approving review of the PR