Feature/readme-nomoretools (#1799)

* docs: replace TDLR with a meaningful heading

* docs: insert section No additional build tools

* Tweak wording

README.md

@@ -8,7 +8,7 @@ Create React apps with no build configuration.
 Create React App works on macOS, Windows, and Linux.<br>
 If something doesn’t work please [file an issue](https://github.com/facebookincubator/create-react-app/issues/new).
 
-## tl;dr
+## Quick Overview
 
 ```sh
 npm install -g create-react-app
@@ -23,6 +23,13 @@ When you’re ready to deploy to production, create a minified bundle with `npm
 
 <img src='https://github.com/camo/506a5a0a33aebed2bf0d24d3999af7f582b31808/687474703a2f2f692e696d6775722e636f6d2f616d794e66434e2e706e67' width='600' alt='npm start'>
 
+### Get Started Immediately
+
+You **don’t** need to install or configure tools like Webpack or Babel.<br>
+They are preconfigured and hidden so that you can focus on the code.
+
+Just create a project, and you’re good to go.
+
 ## Getting Started
 
 ### Installation