Add playground

Author: MadLittleMods

.gitignore

@@ -1,4 +1,6 @@
 node_modules/
 npm-debug.log
 
+playground/node_modules/
+playground/jspm_packages/
 todo.md

.npmignore

@@ -5,6 +5,7 @@ node_modules/
 test/
 .travis.yml
 
-gulpfile.js
 
-todo.md
+playground/
+todo.md
+gulpfile.js

playground/.jshintrc

@@ -0,0 +1,3 @@
+{
+	"esnext": true
+}

playground/README.md

@@ -0,0 +1,21 @@
+# [Playground](https://madlittlemods.github.io/postcss-css-variables/playground/)
+
+The code playground for `postcss-css-variables` is [available live here](https://madlittlemods.github.io/postcss-css-variables/playground/).
+
+
+
+# Build
+
+## Prerequisites
+
+ - [io.js](https://iojs.org/en/index.html) *or Node.js with support for template strings (not currently avaialable)*
+
+ ## Instructions:
+
+When developing run the following to build:
+
+`npm run build-dev`
+
+To bundle for production, run:
+
+`npm run build`