CS130 iteration

news!
How to break the simulator
1. the directory structure
2. how it knows what task you are working on
3. how it remembers how fast you ran last time
4. how to fix it if it's broken (either reinstall, or just copy the files (but not the directories) from cs130/ruby/src/ruby in examples from class)

While loops -- This one repeats something(), over and over, as long as continuation condition is true

                while (continuation condition) {

                    something();

                }