masterslavePI.R 	R script to compute PI=4*\int_0^1 1/(1+x^2) dx.
simplePI.R 		R function to compute PI using slavedaemon.R. 
slave1PI.R 		R functions to compute PI using slavedaemon.R (load 
			balancing with a sever and workers). Use master1PI to 
			run the program.
slave2PI.R 		R functions to compute PI using slavedaemon.R (load 
			balancing with workers only). Use master2PI to run the 
			program.
simPI.R			Use Monto Carlo simulation to compute PI (with plot). 
			Use simPI to run the program.
cslavePI.R		R function to use external C program cslavePI.
			Copy cslavePI.c in Rmpi library directory to your 
			working directory and compile as "mpicc -o 
			cslavePI cslavePI.c"
