Set up npm run build to build dyna3

package.json

@@ -5,6 +5,13 @@
   "private": "true",  
   "main": "dyna3.js",
   "scripts": {
+    "clean": "rm -r site",
+    "prebuild": "npm run clean",
+    "build:coffee": "coffee -o site -c -m src/*.litcoffee",
+    "build:ext":
+      "coffee src/helpers/pkglock_to_externals.litcoffee > site/externals.js",
+    "build:copy": "cp src/*.html site && cp -r node_modules site",
+    "build": "npm run build:coffee && npm run build:ext && npm run build:copy",
     "test": "qunit"
   },
   "repository": {

src/dyna3.litcoffee

@@ -14,7 +14,7 @@ When you load dyna3, you should initially see a three-dimensional coordinate sys
 
         scene = new J3.Scene()
         geometry = new J3.SphereBufferGeometry(1, 5, 5)
-        material = new J3.MeshBasicMaterial( {color: 0x0000ff} )
+        material = new J3.MeshBasicMaterial {color: 0xff00ff}
         ball = new J3.Mesh(geometry, material)
         scene.add ball