Minimalize the react-famous library, remove examples and build-system dependencies.

[trusktr]

(WIP, don't merge!)

This will minimalize the react-famous library, to make it as consumable as possible, not just via NPM, but via GitHub (and hence bower and jspm) as well. Some package managers get libraries directly from GitHub, so keeping the library as lean as possible and agnostic to build systems as possible will make the library the most consumable in any environment. People will also be able to choose between the built version of the library, or the original form of the library and compile it themselves; they'll have maximum flexibility and freedom to use the library the way they want.

We'll put the example up in a separate repo, or perhaps just use the react-famous-seed repo as the goto example.

We'll also update the README with steps on getting started with the most common/standard build systems.