title: Access to store.dispatch in a saga for use with react router redux
body: <p>I'm currently refactoring a react + redux + saga + react-router 3 application to use the new react-router 4 due to breaking changes.  Before I would use browserHistory to direct to an appropriate path based on the results from a saga.  Due to react-router 4 changes, I can't use browserHistory any longer.  </p>
  
  <p>Now I've incorporated react-router-redux to essentially do what browserHistory did.  The problem is that react-router-redux only works within a store.dispatch, e.g. store.dispatch(push('/')).  I can't seem to find a way to access either the store or it's dispatch function inside my sagas.  Any ideas on how to access store.dispatch within a saga?  I know you can pass arguments in the root saga but I don't know how to retrieve them in my actual sagas.  </p>