Added some constants/global variables and the compute function.

compute():
	Description:
		The main function should create a thread for managing compute processes.
		This function should be the start function when creating the thread that manages
		the compute processes.
		The compute() function connects to the clients compute process. The client then
		sends compute() timing information, which compute() calls get_max_num() to
		find the range to have the client search for perfect numbers in.
		Then compute() enters an infinite loop where it receives from the clients compute.
		The client should send the current number and whether it is perfect or not
		separated by a tab (e.g. "6\ttrue"). If the client is done, it should send "done".
		The compute() function takes the received message and first checks if the
		message is "done" (if so it returns, possibly later keep it going to allow other
		compute processes to connect), then if it doesn't it parses the message into an
		array (e.g. "6\ttrue" => ["6", "true"]), sets the cur_num to the first part of the array
		and finally appends the cur_num to the perfect_nums array if the second part of the
		array is == "true".

	Note:
		At some point in the future, this function needs to deal with signals or some way of letting
		the soon-to-be-added report() function signal this thread that the user wants to kill the
		processes. When dealing with the signals, will need a way to send a kill message to the
		client's compute process.