Add rules for react and jsx

[alexander-schranz]

We should also create rules for react and jsx.

This can be simple done by creating a react/index.js

In a react project this can be used the following way:

{
    "root": true,
    "extends": [
        "eslint-config-ma",
        "eslint-config-ma/react"
    ],
    "parser": "babel-eslint",
    "plugins": [
        "react"
    ]
}

The configuration should extend from the react recommended which should be added as peerDependency, should be something like:

// react/index.js

module.exports = {
    "env": {
        "browser": true,
        "node": false,
        "es6": true
    },
    "extends": "plugin:react/recommended",
    "rules": {
         // Add rules here
    }
}

maybe orientate here by the sulu eslint rules for react and jsx https://github.com/sulu/sulu/blob/develop/.eslintrc.json#L105-L180