new FP multiply unit, with thanks to Joao Pampanini

cMIPS/bin/build.sh

cMIPS/docs/installCrosscompiler

cMIPS/tests/FPU_m.c

cMIPS/tests/mmu_tlbwi.s

cMIPS/vhdl/fpu.vhd

cMIPS/vhdl/io.vhd

cMIPS/vhdl/packageWires.vhd

cMIPS/vhdl/tb_cMIPS.vhd

cMIPS/vhdl/units.vhd