Added fixed point math library, updated thread struct with nice field for BSD
added modified thread.h -- nice field
Merge branch 'priority_schedule' of github.com:odiab/cs140 into priority_schedule
Merge branch 'priority_schedule' of github.com:odiab/cs140 into priority_schedule
Merge branch 'priority_schedule' of github.com:odiab/cs140 into priority_schedule