Roger Fan Final Submission

Final submission: https://github.com/rogerfan/grmEstimatorToolbox.

The bulk of my work was done in grmTreatment.py. This module contains two functions:

* calcSimTreatEffects(simnum, outputfile = False)
* calcSimTreatEffects_mpi(simnum, outputfile = False)

Both calculate the various treatment effects, while the latter is programmed to take advantage of parallel processing using MPI.

Examples of usage are contained in example/template.py and example/template_mpi.py, respectively.

Please let me know if there are any issues or if anything is unclear.

Thanks!
Roger