com.github is the identifier for the package provider of GitHub.
This provider enables sourcing individual files from a GitHub repository.
  instdat.repo_owner 
 The owner of the target repository.
  instdat.repo_name 
 The name of the target repository.
  instdat.repo_ref 
 The Git reference (a tag, branch, or commit) of the target repository.
  instdat.filemaps 
 A table which contains mappings for files on GitHub and their local counterparts.
The key for each item in the table should correspond to the full path on the GitHub repository, and the value should be the local destination.