add Elixir LibSass wrapper library to readme (#3130)

Readme.md

@@ -1,7 +1,7 @@
 LibSass - Sass compiler written in C++
 ======================================
 
-Currently maintained by Marcel Greter ([@mgreter]) and Michael Mifsud ([@xzyfer])  
+Currently maintained by Marcel Greter ([@mgreter]) and Michael Mifsud ([@xzyfer])
 Originally created by Aaron Leung ([@akhleung]) and Hampton Catlin ([@hcatlin])
 
 [![Unix CI](https://travis-ci.org/sass/libsass.svg?branch=master)](https://travis-ci.org/sass/libsass "Travis CI")
@@ -30,8 +30,9 @@ CLI tool built by the same people as LibSass.
 - https://github.com/sass/libsass-net (C#)
 - https://github.com/medialize/sass.js (JS)
 - https://github.com/bit3/jsass (Java)
+- https://github.com/scottdavis/sass.ex (Elixir)
 
-This list does not say anything about the quality of either the listed or not listed [implementations](docs/implementations.md)!  
+This list does not say anything about the quality of either the listed or not listed [implementations](docs/implementations.md)!
 The authors of the listed projects above are just known to work regularly together with LibSass developers.
 
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