Project 2 sleep

[Joshua Claxton]

Would you like for our program to sleep between context switches so
you can see what's going on or just let it run at computer speed?

thanks

[Joshua Claxton]

I think i may have answered my own question.

I had previously put the sleep() functionality inside run and yield in
threads.h (which would defeat purpose of threading), but I changed it
so that the sleep was in each infinite looping function in
thread_test.c (which is used for creating a testing environment.)