Package downloads M-NIST digit rec. DB at every iteration

Created by: anjos

This package is downloading the M-NIST database from the respective URL (LeCun's site) at every iteration. The reason is that it has no way to know where it previously downloaded a copy (because it is using a temporary directory to do so).

It would be more useful if the database was downloaded to a known directory.

I'd propose this database provided a "create" action that would allow it to be downloaded and installed within the package.