Assignment 1 complete!

CheckerboardKarel.java in Assignment 1 = done. Yay!
Assignment 2: Target.java complete
Assignment 2: PythagoreanTheorem.java complete
Assignment 2: Pyramid.java complete + a few Chapter 3 textbook problems

half-finished programs:
• figure out a way to reduce repeated code in FindRange.java
(Assignment 2)
• figure out how to round a four-digits-after-decimal double into an
acceptable two-digits-after-decimal dollar value in Problem_03_03.java
Assignment 2: Hailstone.java complete
Merge branch 'master' of https://github.com/16chuang/CS106A