Adds the [`dev-toolkit` npm package](https://github.com/stoikerty/dev-toolkit) to the list of Alternatives.

After some suggestions in my last PR https://github.com/facebookincubator/create-react-app/pull/292, I've changed my project to provide better command-line utilities for initializing an app. Managed to get rid of babel's dev-dependencies as well, so this is now a dependency-free project just like `create-react-app`.

Add aik as possible alternative for create-react-app

* Move setup instructions to CONTRIBUTING.md

* Reword setup instructions slightly

Quik is a tool to prototype and build apps with React and Babel with zero-setup. It also supports HMR, CSS modules, Sass etc.

https://github.com/satya164/quik

* Use a custom eslint rule list

* Sort rules

* Relax some rules