Add buttons example and module

[PebbleKat]

Added Buttons example folder
Added Buttons to examples readme.md
Added module folder containing buttons.js

Please let me know if you think the readme on the buttons example is a bit light.

[cat-haines]

ignore everything except Up, Down, Left, and Right

[HBehrens]

The file symbols-manual.js is meant for all bindings to the transpiled.js that cannot be generated easily. For cases like yours where technically there's no dependency to the transpiled code at all and people would benefit from a "wearable-focused" API on top of WebAPIs, we would like to see small, reusable packages that will alter become NPM modules. Unfortunately, we don't have a good example for this ,yet (will happen next sprint).
Meanwhile, do you mind, moving your convenience wrapper into a separate in your example folder?

You hit the error because document is a WebAPI that doesn't exist in a node environment in which we run the tests.

[PebbleKat]

@HBehrens this should be ready to review now that I've removed the API from symbols-manual.js and created a module instead.

[HBehrens]

I don't think we need the three butkus.* files.

[HBehrens]

you put this logic into an anonymous function to not pollute the global namespace but currentText as well as rocky are still globals.

[PebbleKat]

@HBehrens Ready for you to take another look.