Ticket50154295 model simplification estimation

@kbenne Please help me review this branch for merging.

The branch has gotten a bit out of hand over time. There are 4 groups of changes.

1. Parallel Energy Plus and model simplification fixes. There shouldn't be much for you to review here
1. Addition of approximation engine. This allows you to submit a model and get progressively more accurate year end energy use values over time as simulations run in the background, starting with a linear approximation and moving up to full Radiance simulation. This code is very stand alone, the only concern is the unit tests, which can take a while to run
1. gendaymtx conversion. This is currently working but is not 100% proven. In my opinion it's ready to merge while I sort out the details with Rob.
1. EnergyPlus 8 fixes. 1 of them you already have, then there's the handful output variable renaming. It's entirely possible I was too aggressive and renamed too many things.