Tools to manage Python library's data files

 Pooch manages a data registry by downloading your data files
 from a server only when needed and storing them locally in a data
 cache (a folder on your computer).
 .
 Pooch's main features:
  * Pure Python and minimal dependencies.
  * Download a file only if necessary (it's not in the data cache or
    needs to be updated).
  * Verify download integrity through SHA256 hashes (also used to check
    if a file needs to be updated).
  * Designed to be extended: plug in custom download (FTP, scp, etc)
    and post-processing (unzip, decompress, rename) functions.
  * Includes utilities to unzip/decompress the data upon download to
    save loading time.
  * Can handle basic HTTP authentication (for servers that require a
    login) and printing download progress bars.
  * Easily set up an environment variable to overwrite the data cache
    location.
  * Automatically download your data files so you don't have to keep
    them in your GitHub repository.
  * Make sure everyone running the code has the same version of the
    data files (enforced through the SHA256 hashes).