Add link to SASS Install page

README.md

@@ -10,7 +10,7 @@ Fornax is a static site generator using type safe F# DSL to define page layouts.
 * Creating pages using templates from `.md` files with `layout` entry
 * Creating plain pages without templates from `md` files without `layout` entry
 * Transforming `.less` files to `.css` files
-* Transforming `.scss` files to `.css` files (requires having `sass` installed)
+* Transforming `.scss` files to `.css` files (requires having `sass` installed - https://sass-lang.com/install)
 * Copying other static content to the output directory
 
 ## Planned features
@@ -156,4 +156,4 @@ the project and submit pull requests. Please read [Contribution Guide](https://g
 
 The library is available under [MIT license](https://github.com/LambdaFactory/Fornax/blob/master/LICENSE.md), which allows modification and redistribution for both commercial and non-commercial purposes.
 
-Please note that this project is released with a [Contributor Code of Conduct](CODE_OF_CONDUCT.md). By participating in this project you agree to abide by its terms.
+Please note that this project is released with a [Contributor Code of Conduct](CODE_OF_CONDUCT.md). By participating in this project you agree to abide by its terms.