updating CAF kernel benchmarks
adding alternative microbenchmarks

I think this should eventually replace old microbenchmark tests
adding updated CAF NPBs

This includes CAF and MPI versions of each benchmark. It currently has an MPI
dependency in some cases, though. Need to modify so that it works ok with other
compilers which operate in a shared memory mode (e.g. g95, Intel).
removing non-CAF benchmarks, binaries, and UHCAF-specific stuff from NPBs
modifying test_npb script to make it a little easier to configure
pointing makefile to new versions of microbenchmarks and NPBs
fixing Makefile to work with new microbenchmarks and adding clean rule
removing MPI dependency from NPBs
removing alternate versions from testsuite
removing MPI_dummy
removing npb (superceded by NPB3.3-CAF)
whitespace fixes in docs and correcting sample validation test_file
use original microbenchmarks in top-level performance Makefile
adding cafhash to kernels
adding syncbench to kernels
adding mention of new kernels to INSTRUCTIONS
adding NHASH To CONFIG (for cafhash)
correcting cg_2d
using 100000 for number of iterations

Also minor fix to Makefile help
fixing jacobi test