Establish initial structure, create demo.html

So far this does nothing but clear the screen to magenta, but it's a
start.

package.json

@@ -0,0 +1,23 @@
+{
+  "name": "scratch-render-webgl",
+  "version": "1.0.0",
+  "description": "WebGL Renderer for Scratch 3.0",
+  "author": "Massachusetts Institute of Technology",
+  "license": "BSD-3-Clause",
+  "homepage": "https://github.com/LLK/scratch-render-webgl#readme",
+  "repository": {
+    "type": "git",
+    "url": "git+ssh://git@github.com/LLK/scratch-render-webgl.git"
+  },
+  "main": "./src/index.js",
+  "scripts": {
+    "test": "make test"
+  },
+  "devDependencies": {
+    "eslint": "2.7.0",
+    "json-loader": "0.5.4",
+    "tap": "5.7.1",
+    "twgl.js": "1.5.2",
+    "webpack": "1.13.0"
+  }
+}