make_auc_matrix: Make an n*p AUC matrix for a given sample set and mark
In aidanmacnamara/epiChoose:

This function takes as input a .csv file with fields: Label, Mark, Bigwig

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1	make_auc_matrix(input_data, roi, mark, tmp_dir, quantile_norm = TRUE)

`input_data`	The metadata for each sample. A .csv/.xslx file that contains 'Label', 'Mark', and 'Bigwig' fields.
`roi`	Region of interest, a sorted Granges object that specifies the genomic regions to calculate AUC. It also need 'gene' in the metadata
`mark`	Which mark in `input_data` to use
`root`	TO ADD