updated docs on site to include mixin options

Author: UNA A. KRAVETS

README.md

@@ -17,7 +17,7 @@ This library uses [CSS Filters](https://developer.mozilla.org/en-US/docs/Web/CSS
 | <img src="http://i.imgur.com/dJC1GUv.png" width="48px" height="48px" alt="Chrome logo"> | <img src="http://i.imgur.com/o1m5RcQ.png" width="48px" height="48px" alt="Firefox logo"> | <img src="http://i.imgur.com/8h3iz5H.png" width="48px" height="48px" alt="Internet Explorer logo"> | <img src="http://i.imgur.com/kQ1e7Mk.png" width="45px" height="45px" alt="Edge logo"> | <img src="http://i.imgur.com/iQV4nmJ.png" width="48px" height="48px" alt="Opera logo"> | <img src="http://i.imgur.com/j3tgNKJ.png" width="48px" height="48px" alt="Safari logo"> |
 |:---:|:---:|:---:|:---:|:---:|:---:|
 | 43+ ✔ | 38+ ✔ | Nope ✘ |  13 ✔ | 32+ ✔ | 8+ ✔ |
- 
+
 For more information, check on [Can I Use](http://caniuse.com/#feat=css-filters).
 
 ## Usage
@@ -68,7 +68,7 @@ _For use in HTML markup:_
 
 * * *
 
-### Use Sass `@extend`
+### Use Sass `@extend` or `@mixin`
 
 If you use custom naming in your CSS architecture, you can add the `.scss` files for the provided styles within your project and then `@extend` the filter effects within your style definitions. If you think extends are stupid, I will fight you 😊.