Convert To Javascript

Converts `cylon-sphero` to be in plain Javascript. Also replaces Grunt with a Makefile.

Process:

1. Remove `test/src`
2. Move `test/dist/specs` to `test/specs`
3. Update test support files to point to new location
4. Prettify `coffee`-generated specs.
5. Move `dist/` to `lib/`
6. Prettify/refactor `lib/*.js`, adding comments from CoffeeScript source
7. Remove `src/`
8. Remove `grunt-*` deps and `Gruntfile`
9. Add `Makefile`.