docs: Update README

Added content to the README to make it follow NPM style more closely

README.md

@@ -1,14 +1,17 @@
 # TypeScript library starter
 
+> A TypeScript library to handle vector and matrix math.
+
+[![NPM Version](https://img.shields.io/npm/v/ts-vector-math.svg)](https://npmjs.org/package/ts-vector-math)
 [![styled with prettier](https://img.shields.io/badge/styled_with-prettier-ff69b4.svg)](https://github.com/prettier/prettier)
 [![Greenkeeper badge](https://badges.greenkeeper.io/aszecsei/ts-vector-math.svg)](https://greenkeeper.io/)
 [![Travis](https://img.shields.io/travis/aszecsei/ts-vector-math.svg)](https://travis-ci.org/aszecsei/ts-vector-math)
 [![Coveralls](https://img.shields.io/coveralls/aszecsei/ts-vector-math.svg)](https://coveralls.io/github/aszecsei/ts-vector-math)
 
-A TypeScript library to handle vector and matrix math.
-
-### Usage
+## Install
 
 ```bash
 npm install ts-vector-math --save-dev
 ```
+## License
+[MIT](http://vjpr.mit-license.org)