* Add Storybook to the user guide

* Add the missing "Snapshot Testing" link.

* Change the title to something nicer

Old title was looks like a marketing pitch. Change it to something looks great.
The new one is: Developing UI Components with React Storybook.

* Mention React Storybook as a third party tool.

* Nits

* Minor changes

Enable sourcemaps in development

* Update css-loader to 0.26.0

* Update the production webpack config

In the `create-react-app` command, try to install packages using Yarn.
If Yarn is not installed, use npm instead.

In `react-scripts`, detect if the project is using Yarn by checking if
a `yarn.lock` file exists. If the project is using Yarn, display all
the instructions with Yarn commands and use Yarn to install packages
in `init` and `eject` scripts.

Upgrade `babel-loader` and remove the cache directory configuration
that was added in #620. `babel-loader` now uses the
`./node_modules/.cache/babel-loader` directory by default, so the
custom config is no longer needed.

* Always build before deploying to gh-pages

* Add line to gh-pages deploy docs about CNAME file

* Remove spaces in npm run command for Windows

* Grammar nit

* Minor tweaks

gh-pages supports https. It's important for prominent help files to encourage best practices.

 - babel-preset-react-app@1.0.0
 - create-react-app@0.6.0
 - eslint-config-react-app@0.3.0
 - react-dev-utils@0.3.0
 - react-scripts@0.7.0

* Update dependencies

* Use published version of eslint-config-react-app for development

We dogfood on our eslint-config-react-app by using it as our ESLint config,
but installing it from the local folder causes problems when its peerDependencies
are updated, because npm won't update it unless the version number changes.

Use the published version for dogfooding so it can be installed from npm.

* Added note about env server restart

As discussed in [#870](https://github.com/facebookincubator/create-react-app/issues/870)

* Style nit

* Create asset filenames mapping on the build output

I use danethurber/webpack-manifest-plugin on Webpack production
configuration to create a file named `asset-manifest.json` which contain a
mapping of all asset filenames to their corresponding output file.

`asset-manifest.json` will be located at the root of output folder.

This'll resolve #600

* Add an explanation for ManifestPlugin

* Make webpack-manifest-plugin's version exact

* Update react-scripts dependencies to use jest 16

* Remove testRegex from Jest config (now default)

* Exit on any errors passed in build stats

* Match console error output in start.js

fixes facebookincubator/create-react-app#824

* Update instructions on publishing to GitHub pages

* Update README formatting

* Beaufity output of eject.js script

* change formatting of the eject.js output and move colors to cyan

* change message about file copy

* add missing three dots to some statements in eject.js script

* change color of "copying files" line and do not repeat copy path anymore in log

* fix merge conflict

* Remove yellow color from "Removing dependency" line

* changing color to "Adding dependency" line

* Add line that outputs which react script is getting replaced by similar node script

* remove not used anymore colors

* add console line about updating Jest configs

* fix typo

* change formatting of replacing script output in eject.js

* remove "Writing package.json" file console output

* make quotes cyan in "Replacing script" console output

* update console log output for Jest, Babel, ESLint update and group them under one statement

* Style nits

* Define process.env as object

* Fix define process.env

* fix NODE_ENV check

* Fix style nitpick

* Typo fix in webpack.config.dev.js comments

* Typo fix in webpack.config.prod.js comments