Lightweight Pipeline documentation

As the name suggests - a lightweight, easy to modify pipeline. Initially built for EEG analysis using MNE-Python and MNE-BIDS.

Main design criterion is to keep the controller part minimal.

Goals

• Provide a scheme to model concrete pipeline steps after.

• Take care of a configuration file handling and saving/loading to some extend.

• Decouple the content of a pipeline, i.e. its processing logic, from the organisatorial part.