* Add support for URL objects in Link and Router

* Fix typo in comment

* Fix possible bug if the `href` prop is `null`

* Document the usage of URL objects in Link and Router

* Update readme.md

* Parse URL to get the host & hostname in `isLocal`

This should check if the current location and the checked URL have the same `host` or `hostname`.

* Format `as` parameter from object to string if required

* Format `href` and `as` inside the construct and componentWillReceiveProps

* Use `JSON.stringify` to compare objects

* Add usage example

* chore(package): update chromedriver to version 2.28.0 (#1386)

https://greenkeeper.io/

* Refactor the codebase a bit.

* Change the example name.

* Add a few test cases.

* Add the example to the README.