Adding bioconda link

Author: spond

README.md

@@ -1,5 +1,7 @@
 
-![logo](img/logo-small.png)
+![logo](img/logo-small.png) 
+
+[![install with bioconda](https://img.shields.io/badge/install%20with-bioconda-brightgreen.svg?style=flat)](http://bioconda.github.io/recipes/cawlign/README.html)
 
 ## Codon-Aware aligner (`cawlign`)