This PR removes `babel-preset-stage-0` from the dependencies list, that was missing on #1959.

Improving `next.js`, one slash at a time

* Update emotion examples with new API for SSR and React endpoint

* Actually fixing tab replacement

* Display data fetching errors in Apollo examples.

* Prevent Apollo GraphQL errors from crashing SSR.

Also tidied a few comments in the vicinity.

* Fix decorated component display name issues for Apollo examples.

* Fix linting errors and implement #2286

* Add with-emotion example

* Fix linting errors

This fixes the styled-jsx HMR not working error

* switch from fly to taskr

* update taskfile

* add with-react-ga example

* fix title in Readme

With a hard coded address on the client, the app no longer works when deploying, which is annoying since there's a handy 'deploy now' button on the readme.

By removing the hard coded address socket.io will connect to the location host automatically so it works both on development and production.

commit ced48c3fcfd1880016b08590e1b50827247b7cfb
Author: Arunoda Susiripala <arunoda.susiripala@gmail.com>
Date:   Wed Jun 7 11:28:43 2017 +0530

    Make sure XSS fix doesn't break our 404 support.

commit d40c833aa16660d547df785bb52e69ecf9a717f2
Author: Arunoda Susiripala <arunoda.susiripala@gmail.com>
Date:   Wed Jun 7 09:08:41 2017 +0530

    Prevent url path based XSS attacks.

* Reload webpack via hot-reloader when needed.
We need to do this specially we removed a previosly
built page from the filesystem.

* Make sure reloading is happen only once

* Reload only if there's a missing page error.

* Remove debug logs.

* 2.4.2

* Refactor the codebase a bit.

* Move some commonly used regexp to a utils module.

* Handle the reloading well when there's a custom error page.

* Add a HMR test case.

* Close the browser in the test case.

* 2.4.2

* Appveyor tests no longer breaks due to chrome installation.
See: https://goo.gl/pNe7iu
It failed randomly due to some checksum issues.
Since we don't care about privacy or security in the CI,
we can ignore checking the checksum.

The fix is to add a heartbeat less than 5 secs.

* Fix test failures due to styled-jsx change.

* Update styled-jsx to the latest.