Added&modified pm/schedule.c and sched/schedule.c

Made SCHEDULING_MAXPRIO contain nice.
Implemented do_nice based on new functionality.
Printing upgrades and more!

Added get_winner for use in do_noquantum's upgraded dynamic scheduling
system.
Renamed rv to err.
Added char* parameter to schedule_process so we can print with a tag.
Starting to implement do_changetickets.