changed tools.c and tools.h to mine, they are a little cleaner
cleaned and finished registers.c
finished decodeStage.c & decodeStage.h
finished executeStage.c & executeStage.h
finished memory.c & memory.h
finished memoryStage.c & memoryStage.h
finished writebackStage.c & writebackStage.h
fixed getCC & setCC
fixed registers.h