Update README

Author: simonsmith

README.md

@@ -1,5 +1,7 @@
 # SUIT CSS base
 
+[![Build Status](https://travis-ci.org/suitcss/base.svg?branch=master)](https://travis-ci.org/suitcss/base)
+
 Base styles for web applications. Provides a thin layer on top of
 [Normalize.css](https://github.com/necolas/normalize.css).
 
@@ -25,6 +27,12 @@ To generate a build:
 npm run build
 ```
 
+To lint code with [postcss-bem-linter](https://github.com/postcss/postcss-bem-linter) and [stylelint](http://stylelint.io/)
+
+```
+npm run lint
+```
+
 To generate the testing build.
 
 ```