Add command for SCSS (#584)

* Add command for SCSS

Thought I should PR this one in, I've been using it for a while.

* Add Sass

May as well include both of these while i'm here

package.json

@@ -161,7 +161,9 @@
             "nim": "nim compile --verbosity:0 --hints:off --run",
             "lisp": "sbcl --script",
             "kit": "kitc --run",
-            "v": "v run"
+            "v": "v run",
+            "sass": "sass --style expanded",
+            "scss": "scss --style expanded"
           },
           "description": "Set the executor of each language.",
           "scope": "resource"