Added in-text examples from Chapter 16.
Removing executable, don't track binary compile-time artifacts.
Completed question 1 (print histogram data in standalone executable).
Completed question 2 of Chapter 16 (reversing a file's contents and writing to another file).
Completed question 3 of Chapter 16 (long-running program for compilation comparison).
Completed solution to final problem in book (question 4, Chapter 16).