Clarification on Programming Exercise 7.1

I added the sentence:
"The variant should behave the same as the original 
{\tt forker} program given the same input."
to the text of the Programming Project 7.1 to specify that the end-result of the project should share as much code as possible between the parent and child while still maintaining the same functionality.
Update processes.tex

Change in wording. Forker.cpp takes no command arguments or any user-input; the focus here should be on the output remaining the same.
Merge pull request #67 from natejenson/patch-1

Clarification on Programming Exercise 7.1