added gitter badge

README.md

@@ -1,6 +1,8 @@
 GitHub Workflow for [Alfred 2](http://www.alfredapp.com)
 ==============================
 
+[![Gitter](https://badges.gitter.im/gharlan/alfred-github-workflow.svg)](https://gitter.im/gharlan/alfred-github-workflow?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
+
 It works similar to the original (and removed) [GitHub command bar](https://github.com/blog/1264-introducing-the-command-bar) and to its [update](https://github.com/blog/1461-a-smarter-more-complete-y-search-bar), the keyword is "gh" (example: `gh github/gollum issues`).
 
 You have to login (`gh > login`) before you can use the workflow. The login uses OAuth, so you do not have to enter your credentials.