added travis ci badges to readme

Author: bahmutov

README.md

@@ -7,6 +7,8 @@ Supports:
 - `git://` and `.git` w/ `#commit` or `@version`
 - All 5 different ways you could download a freaking tarball/zipball
 
+[![Build status][ci-image] ][ci-url]
+
 ## API
 
 ### [user, repo, version] = parse(url)
@@ -19,3 +21,6 @@ parse('component/emitter#1') // => ['component', 'emitter', '1']
 ```
 
 See the tests for all the different types of supported URLs.
+
+[ci-image]: https://travis-ci.org/bahmutov/parse-github-repo-url.png?branch=master
+[ci-url]: https://travis-ci.org/bahmutov/parse-github-repo-url