Removed unnecessary file and fixed a tiny thing in part 3
Part 4: Updated comments and comment headers for utility.cpp and utility.h
Part 4: Updated Makefile comment header
Another trivial thing I noticed incorrect in part 3
Part 4: Added comments, fixed comment headers and whitespace in node.cpp and node.h
Part 4: Updated comments, comment headers, and fixed whitespace for dequeue.cpp and dequeue.h
Part 4: Updated comment header and imported part 3 changes to main.cpp
Yet another minor thing from part 3...