Commit prior to start 'generic' simulations.

Simulation scripts have been modified to reflect new simulation design.  In addition

-Corrected bug where tau_epsilon was hard coded for 2:t.steps in Sim_CPIF

-Changed Sim_CPIF to use multinomial instead of Dirichlet

-Fixed bug by adding "as.vector" when calculating "Which.distances" in sim_data_generic when subsetting a larger grid (residual column and row names were problematic).