Load balancing - PE decomposition

Use curves to predict the best PE decomposition (a first guess)

$ python modelPred.py --npes=4000
--submodels=offOxN216,fullChemN96,
medOrca025 

...

*** Decomposition stats ***
The coupled code is expected to run at 
1.858yrs/day on 3996PEs, which are shared across
 - medOrca025 at 1.858yrs/day on 1540PEs 
(20x77,22x70,28x55,44x35,70x22)
 - offOxN216 at 1.859yrs/day on 1924PEs 
(26x74,52x37,74x26)
 - fullChemN96 at 1.860yrs/day on 532PEs 
(28x19)