* Add prettier for examples directory

* Fix files

* Fix linting

* Add prettier script in case it has to be ran again

I spent far too much time fiddling with this example project before realizing it contained a bug in the store initialization logic and it was a bit more complex than it needed to be.

* The custom server was not needed
* The store-initialization did effectively the same thing twice for no reason
* And wrapping MyApp component in a HOC was wholly unnecessary indirection

My changes are split into four discrete commits for clarity.

in flavor of https://github.com/zeit/next.js/pull/4377

* Adds mobx example

* Fix coding style to match JS Standard

* Removes unecessary link

* Update README.md

* Update README.md

* Change next version from beta to ^2.0.0-beta

* Assigns the store to a local var

* Adds navigation in the example

* Removes unecessary imports

* Fix coding style to match JS Standard

* Fix Clock import