Add Appveyor badge

README.md

@@ -1,6 +1,12 @@
 # Notify
 
-[![Crates.io](https://img.shields.io/crates/v/notify.svg?style=flat-square)](https://crates.io/crates/notify)[![Crates.io](https://img.shields.io/crates/l/notify.svg?style=flat-square)](https://creativecommons.org/publicdomain/zero/1.0/)![Crates.io](https://img.shields.io/crates/d/notify.svg?style=flat-square)[![Travis](https://img.shields.io/travis/passcod/rsnotify.svg?style=flat-square)](https://travis-ci.org/passcod/rsnotify)[![Code of Conduct](https://img.shields.io/badge/contributor-covenant-123456.svg?style=flat-square)](http://contributor-covenant.org/version/1/1/0/)
+[![Crate version](https://img.shields.io/crates/v/notify.svg?style=flat-square)](https://crates.io/crates/notify)
+[![Crate license](https://img.shields.io/crates/l/notify.svg?style=flat-square)](https://creativecommons.org/publicdomain/zero/1.0/)
+![Crate download count](https://img.shields.io/crates/d/notify.svg?style=flat-square)  
+[![Appveyor](https://img.shields.io/appveyor/ci/passcod/rsnotify.svg?style=flat-square)](https://ci.appveyor.com/project/passcod/rsnotify) <sup>(Windows)</sup>
+[![Travis](https://img.shields.io/travis/passcod/rsnotify.svg?style=flat-square)](https://travis-ci.org/passcod/rsnotify) <sup>(Linux and OS X)</sup>  
+[![Code of Conduct](https://img.shields.io/badge/contributor-covenant-123456.svg?style=flat-square)](http://contributor-covenant.org/version/1/1/0/)
+
 
 _Cross-platform filesystem notification library for Rust._