Luigi Integration

[markmcdowall]

There is a runner script for use with pyCOMPSs, but it would be handy to have an equivalent runner script for Luigi.

The script should allow Luigi to intercept the @task and @constraint decorators and redirect them to the relevant headers for use in Luigi depending on the HPC infrastructure that is involved (eg LSF, SGE, Spark, etc)

This would allow the scripts to run within all common HPC infrastructures found in academia.

Even though work might be required here, this wrapper should eventually be made available within the mg-tool-api so that each repo does not have to have its own copy.