Merge pull request #1 from briandrawert/master

initial commit of the DistributedEnsemble and ParameterSweep classes
Work in progres
Fixed merge conflicts
distributed ensemble uses shared storage, progress bar etc.
Missing imports
Propagate error
Merge branch 'develop' of https://github.com/ahellander/molnsutil into develop
removed use of engine_id
Merge pull request #2 from ahellander/develop

Develop
Merge pull request #1 from ahellander/master

basic stuff is working