Add variable for small rounded corners
Replace local version of react component generator with npm library

I pulled the local version of the react component generator out into a
separate npm library, so I can try it out in other projects.

It seems to work exactly the same - I just had to change one path in the
'accio.config.js' to point to the new location of the react_component
generator.

I had been trying to set up React-font-awesome previously, and it wasn't
building correctly because of a conflict with this version of React. For
now I just `npm uninstall`ed the react font awesome library to move
forward with this other thing.