page table walk, several fixes

cMIPS/bin/assemble.sh

cMIPS/bin/compile.sh

cMIPS/docs/cMIPS.pdf

cMIPS/include/cMIPS.h

cMIPS/include/cMIPS.ld

cMIPS/include/cMIPS.s

cMIPS/include/cMIPSio.c

cMIPS/include/handlers.s

cMIPS/include/start.s

cMIPS/tests/divmul.c

cMIPS/tests/extCounter.c

cMIPS/tests/extCounterInt.c

cMIPS/tests/interrJR_dlySlot.s

cMIPS/tests/interr_x2.s

cMIPS/tests/pt_walk.c

cMIPS/tests/pt_walk.expected

cMIPS/tests/sieve.c

cMIPS/tests/testAllLatencies.sh

cMIPS/tests/uart_irx.c

cMIPS/vhdl/core.vhd