Read & write pipeline configuration from/to YAML

[shaypal5]

This is a feature that has been discussed and requested several times.

A couple of independent projects tried to do exactly that, but I believe it is worthwhile to have one official API exposed by the package, and also kept up-to-date:

• https://github.com/blakeNaccarato/pdpipewrench
• https://github.com/altescy/pdpcli
• https://github.com/neilbartlett/datapipeliner