Implemented simple MLFQ scheduler and added getusage
	modified:   .gitignore
	modified:   getusage.c
	modified:   proc.c
	modified:   proc.h
	modified:   syscall.c
	modified:   sysproc.c
	modified:   types.h
	modified:   user.h
	modified:   usys.S
Updating system call code to be less verbose
	Updating getusage program to new output
	Updating scheduler to usable code
	modified:   getusage.c
	modified:   proc.c
	modified:   sysproc.c
Changed getusage to use ms as units instead of interrupts and made ls do the getcount system call
	modified:   getusage.c
	modified:   ls.c
	modified:   sysproc.c