File subclasses

[diatomsRcool]

According to Gen3, these are the different file types we will be working with
https://gen3.biodatacatalyst.nhlbi.nih.gov/DD
Aligned Reads
Imaging File
Imaging File Reference
Reference File
Simple Germline Variation
Sleep Test File
Submitted Aligned Reads
Submitted Unaligned Reads
Aligned Reads Index
Germline Variation Index
Reference File Index