Added grid functions + MCMC on grid (good to go)
Ready to launch grid MCMC, fixed a few syntax errors in functions_migration.c/binomialMCMC.R/HunterMCMC.R. Modified functions in functions_migration.R (including makeGrid) - and added a function to partition the grid (work in progress). Next, need to figure out how to partition the grid and assign houses to distinct spots.