Add a link to the travis build page

README.md

@@ -1,4 +1,4 @@
-Amber ![Travis CI Status](https://secure.travis-ci.org/NicolasPetton/amber.png)
+Amber [![Travis CI Status](https://secure.travis-ci.org/NicolasPetton/amber.png)](https://travis-ci.org/#!/NicolasPetton/amber)
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 By Nicolas Petton <petton.nicolas@gmail.com> and [Amber contributors](https://github.com/NicolasPetton/amber/contributors)