* Update the string that clears the console.

#1914
I've tested it with Windows 10 and 7, node versions from ~5.0.0 up to 7.7.0.
Didn't managed to test it on 8 but it should be fine.

* Update windows string

Add windows specific string for clearing the console.

* add support to set REACT_EDITOR to none

* change README message

* change condition to avoid problems with editor being null

* move condition to avoid extra code

* Update README.md with a note that reminds users to prepend REACT_APP_ to their environment variables. 
* Based on #865, where Dan Abramov suggests the person who filed the issue create a PR with these changes.
* Took the language from [Adding Custom Environment Variables](https://github.com/facebookincubator/create-react-app/tree/master/packages/react-scripts/template#adding-custom-environment-variables)

Fixes #2793

Adds support for the error overlay to detect and open the file with the error in MacVim.

Relates to #2636.

* Fix path regex match bug

* Use the escape-string-regexp package to escape regex characters

* Remove redundant character escape from path

* Add removed escape of backslashes

Replace `provide a lot value` with `provide a lot of value`.

* use safer/more aesthetic syntax

* fix typo

The launch configuration code provided is not compatible with VSCode since version 1.19.
The proposed documentation change is based on the response by a VSCode team member.

References:
https://github.com/facebookincubator/create-react-app/issues/3602#issuecomment-352075571
https://github.com/Microsoft/vscode/issues/40293#issuecomment-352017028

Replaced `it's` with `its`

the code got updated from `detect()` to `choosePort` while the comment did not.

This fixes the broken link to removed `href-no-hash.md` file, that is no longer available in the [eslint-plugin-jsx-a11y](https://github.com/evcohen/eslint-plugin-jsx-a11y) plugin (since [6.0.0](https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/a14617528cda23c6c88902ace1d083e4e13ac271/CHANGELOG.md))

Fix another dead link

* docs: adding section about debugging tests

* docs: removing node-inspector references

* docs: replacing terminal command with npm script

* Update README.md

* add —use-npm flag to bypass yarn

* add e2e test for —use-npm flag

* improve eject message

* cross os implementation

* extra watch options regex to react-dev-utils

* fix regex

* add test

* fix eslint error

* include react-dev-utils test in CI script

* attempt to fix import error

* attempt to fix error on CI

* Update .eslintrc

 - react-scripts@1.0.17