Support contexts for easier integration with React Router

[ericclemmons]

Resolver.createContainer(Fixture, {
  contextTypes: {
    router: React.PropTypes.func
  },

  resolve: {
    users: (props, context) => fetch(`/api/users/${context.params.userId}`)
  }
});

[iamdustan]

Would this be done with the following:

  static createContainer(Component, props = {}) {
    // ...
    Object.assign(Component.contextTypes, props.contextTypes);

    class ComponentContainer extends React.Component {

[ericclemmons]

Pretty much, yep!

[ericclemmons]

Well, one caveat. I don't want to alter the behavior of the underlying Component, so the props and context will only be available for the resolving function(props, context) { ... } for loading the data.

The original function should remain unaltered.