Add UpSet plot script

[rbeiko]

Please add the script 'BuildUSP.py' to ARETE. The attached archive contains the script, example data, and an example of a call to the script.

The script requires an input samplesheet and the 'feature_profile.tsv' file.

• The user specifies one or more column headings from the samplesheet (in nextflow.config or when ARETE is invoked?) and these are used to produce the plots, one per column.
• The script warns but continues to run if a column has only a single value (which defeats the purpose of the UpSet plot!) or if the column name is not present in the samplesheet.
• Feature categories are extracted automatically based on leading names and underscores, for example 'plasmid_AB369' and 'plasmid_AC732' will both be counted as plasmids.

The script should execute immediately after the feature profile is generated.

UpSet_script.tar.gz