Merge branch 'mpi4py' of https://github.com/SKA-ScienceDataProcessor/…

…algorithm-reference-library into mpi4py

Execution frameworks demo 22-11-2018

Merge branch 'master' of https://github.com/SKA-ScienceDataProcessor/…

…algorithm-reference-library

Gleam pipelines still had components

Typo in CHANGE.md

Notebooks need relative path

import sys, os
sys.path.append(os.path.join('..','..'))

Misnamed input var in imaging-spectral