Add summary printout at end of workflow

[tdivoll]

• print out the list of columns in CSV outputs
• print list of taxa recovered
• standardize metadata reporting - use EML template!
• need legends for big output tables

[tdivoll]

For uploading data to Dryad

[tdivoll]

https://datadryad.org/dataset/doi:10.5061/dryad.h18931zst#readme