* Adding postcss-flexbugs-fixes

Using postcss-flexbugs-fixes to fix all flexbug's issues.

* Adding flexbox: 'no-2009' to Autoprefixer

It will add flexbox prefixes only for final and IE versions of
specification.

* Support node scripts in BROWSER

Modify OpenBrowser.js to run node scripts specified with the BROWSER environment
variable . If the value of the BROWSER environment variable ends with '.js' a
child process is spawned to execute the script with node.js. Any
arguments passed to npm start are also passed to this script, as well as
the url where the app is served.
The command executed in the child process is:

node <pathToScript> [OPTIONS] <url>

Update User Guide.

* Tweak code style

* Pin dep

* Comment out 0.10 docs

* Support hoisting react-scripts

* require.resolve() loaders and configs

This makes it so that loaders and configs are resolved relative to the config rather than to the app. This seems to make more sense to me.

* ESLint Config: Upgrade eslint-plugin-jsx-a11y and activate more rules.

* Try to fix Lerna

* Update README.md

* Remove html-has-lang

* Update README.md

* Upgrade to Jest 19

* Use testMatch

* Correct version

* Show network address on start

* Tweak visual representation

* Change proxy handling to allow multiple proxies to be specified in package.json.

* Up webpack-dev-server to 2.4.2

Webpack Dev Server version 2.4.2 handles the external websocket upgrade
for all proxies

* Fix the listen() call

* Switch to correct default host

* Remove promises and extract to react-dev-utils

* oops

* Tweak error and warning output

* Add a colon

* Add custom eslint formatter

* Add formatter docs

* Update formatter docs

* Slightly tweak it

* Update README.md

* Temporarily fork detect-port

* Fix get process id

* Use different package

* Unnecessary var

* Blacklist confusing global variables

* Blacklist globals

* Fix kitchensink test to lint

* Edit the list

* Use no-restricted globals for this

* Click to view source

* Update package.json

* Update package.json

* Fix lint

* Browser sort is not stable

* Fix ordering of final message

* Register the warning capture

* Display only createElement warnings

* Use different method name

* Fix regression

* Ignore errors with only node_module files

* Ignore null files, too

* Revise count

* Revise warning

* Update overlay.js

* Add support for https://github.com/facebook/react/pull/9679

* Use absolute paths

* Trim path if it's absolute

* Make sure it's an absolute path

* Oops

* Tweak for new behavior

* Make it safer

* More resilient warnings

* Prettier output

* Fix flow

* support different env configs.

* fomrat code

* Hide doc

* Slightly rework the PR

* Remove .env in default template
* Use just one entry in the paths
* Unify env.js and loadEnv.js

* Oops, forgot these folks

* update readme with fix from https://github.com/facebookincubator/create-react-app/issues/1939

* update with better globbing

* added note

* updating with a note and reverting previous changes

* how about this?

* refactor

* added note about new files back in after verifying locally

* spaces back in, sorry was my editor!

* removed note about new files :)

* added bullet about new files issue currently open on node-sass

* ༼ つ ◕_◕ ༽つ stack-frame-overlay

* Fix linting

* Remove auto overlay

* Fix e2e

* Pull in the rest

* Appease flow

* Correct dep

* Remove old repo references

* Check flow on test

* Test overlay in e2e

* Add cross env

* Rename package

* Make sure it gets built post-install

* Update the README

* Remove extra builds now that there's a postinstall script

* Revert "Remove extra builds now that there's a postinstall script"

This reverts commit 8bf601db.

* Remove broken script

* Fix some dev ergo

* Bump minimal Node version to 4.7.0

* Bump minimal Node version to 4.7.0

Modified additional files that needed a bump to 4.7.0 minimum node version

* Bump minimal Node version to 4.7.0

Reverse changes to packages/create-react-app/index.js as this file needs to continue to work on Node 0.10+

* Bump minimal node version to 6

* Bump minimal node version to 6

* Bump minimal node version to 6

* Revert "Ignore the yarn cache directory (#2063)"

This reverts commit 94149c77.

* Revert "Forbid using window properties as global variables (#1840)"

This reverts commit 5a7d8e89.

* Forbid using window properties as global variables

* Change globals list to match Standard.

* Fix globals

* Fix instructions for serving with now

Not sure if new, but the `--single` flag is now important.

* Keep it shorter

* Update README.md

* Update README.md

* Suggest to create .eslintrc for IDE lint plugins

* Update README.md

* Update README.md

* Define dev chunk names

Fixes #2046

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