Updated readme with install and license.

Author: roymckenzie

README.md

@@ -2,4 +2,13 @@
 
 A Google Chrome extension that detects zero-width characters on a page, highlights the containing DOM element, and displays a warning at the bottom-right of the element.
 
+## Install
+
+Install [the extension](https://chrome.google.com/webstore/detail/detect-zero-width-charact/icibkhaehdofmcbfjfpppogioidkilib) from the Chrome Web Store.
+
+## Screenshot
 ![Paragraph with offending zero-space characters in it.](http://image.ibb.co/bQNFux/tom_foolery.png)
+
+## License
+
+Detect Zero-Width Characters Chrome Extension is an Open Source project covered by the [GNU General Public License version 2](LICENSE).