Updated documentation

docs/en/compiling-front-end-files.md

@@ -0,0 +1,29 @@
+# Compiling Front-End Files
+
+UserForms stylesheets are written in SASS, so to make changes you'll need to have Compass installed.
+
+## Debian/Ubuntu
+
+```sh
+$ apt-get update
+$ apt-get install ruby
+$ gem install compass
+```
+
+## OSX
+
+[Install homebrew](http://brew.sh). Then:
+
+```sh
+$ brew update
+$ brew install ruby
+$ gem install compass
+```
+
+## Compile assets
+
+Make your changes to `scss/UserForms.scss` or `scss/UserForms_cms.scss`. Then navigate to the `userforms` folder and run:
+
+```sh
+$ compass compile
+```

docs/en/index.md

@@ -27,6 +27,7 @@ and without getting involved in any PHP code.
  * [Installation instructions](installation)
  * [Troubleshooting](troubleshooting)
  * [User Documentation](user-documentation)
+ * [Compiling Front-End Files](compiling-front-end-files)
 
 ## Thanks