added check for running processes before clearing memory
implementing round robin and context switching
fixed running multiple processes bug
implemented round robin and context switching
implemented host display updates on context switch
implemented ps shell command
implemented kill shell command
added logging of scheduling events, fixed quantum bug, implemented mode bit change to kernel mode/user mode when necessary
added base and limit registers to memory accessor and pcb object; created memory accessor in host os
removed host display code from cpu simulation code
added more comments
fixed another quantum bug