* Rename Firebase Auth example

* Update gitignore to include npm5 lockfile

* Cloud Function

* Add Next app with two pages to demonstrate navigation

* Add Firebase Hosting and configuration to Host & Deploy

* Fix errors in rename for firebase-auth example

* Recommend pkg managers with caches for better perf

* Update with-firebase-hosting example

Fix code

* Update with-firebase-hosting example

Fix npm scripts and package.json files

* Update with-firebase-hosting example

Update README & install scripts

* Update with-firebase-hosting example

Update example package name

* Update with-firebase-hosting example

Fix to use single-quotes

* Update with-firebase-hosting example

VSCode did not like single-quotes! Sorry

* Fix gitignore file

By creating an intermediary component (with the HOC)
we save some React rendering logic.
That's also addressing an issue with JssProvider (react-jss)
that generate a new index at each render.

Following on from https://github.com/zeit/next.js/commit/f8950e9b4c4c25f22047f5b019a66bf77bc1457d

* Make dynamic import spec compliant.
Now we simply return the whole module incl. default field
In 'next/dynamic' we pick the default field if there is.
Since modules with default is mostly used next/dynamic, for the enduser, this change has no effect.

* Rename module into m
Using module could be confusing.

It's safe to use this as we don't use any platform specific Node.js features.

Add propTypes for replace and object support for href and as.

Add more HMR test cases

Sometimes, we've to reload the page for some changes.
Even if so, we need to do it if that change is for the current page.

* Show webpack errors in all pages.
When there's a webpack error that means HMR failed too.
So, showing other pages won't makes sense since user
can't edit them and get changes via HMR.
That's why now we show the error on all pages.

* Remove exact propType checks from the error component.
When there's an error, something this check shows in the console.
That means it could accept more props.
Also this is not a public API. So, we don't want to do propType checks.

examples/with-react-helmet: upgrade react-helmet to v5.1.3 and fix invariant violation caused by bodyAttributes (#2587)

So, now we only use it for production.

Fixes #2578

This was causing the error “Failed prop type: Link: unknown props found: as in Link” when used with next-routes.

* adds with react-i18next example

* lint example code

* remove unneeded .babelrc

This reduce the server boot-up time a lot.
With a 2015 MacBook Pro, it went down from 1000ms to 200ms

* Update with-emotion to flush SSR styles on refresh

* with-emtotion: remove @apply, use composes

* fix env determination