Implemente NFS datasource

Created by: igabriel85

Implement NFS datasource, thus training data should be loadable from distributed data sources.

See:

https://github.com/DIPET-UVT/EDE-Dipet/blob/53c0510fbd5cdc78738b51d0fa2c75e03f67aeb6/edeconnector.py#L352