Add jsonify method

I think I accidentally deleted the two Start/Stop launch files from my repository. It shows in the diff. I downloaded it back into the launch folder but the .gitignore file suggested not to add it back on. I don't know what to do.


When creating hashmaps, prefer to use `Maps.newHashMap()` instead of calling the HashMap() constructor. This way its a little more expressive and potentially allows us to take advantage of hashmap caching in the future.