PCE: solve_PCEQoIs, add 'samplePCE', Issue #29, pt1
PCE: solve_PCEQoIs, add 'samplePCE', Issue #29, pt1

Add the function.  It compiles.  Need to pass random numbers
and test.

zat1gi/stochastic,zat1gi/stochastic,zat1gi/stochastic,zat1gi/stochastic