Add postfetch option

[lexich]

• Add postfetch option - you can organize chain of calling events after the current endpoint will be successful executed

{
  user: "/user/info",
  logout: {
    url: "/user/logout",
    postfetch: [
      function({data, dispatch, getState}) {
        dispatch(actions.user.reset());
      }      
    ]    
  }
}

• add babel plugin https://github.com/59naga/babel-plugin-add-module-exports for support common.js require

import reduxApi from "redux-api";
// or
const reduxApi = require("redux-api");
// or
const reduxApi = require("redux-api").default;