Add npm package.json and setup webpack to transpile ES6/JSX and compile JS files for frontend refactor. See readme.md in assets/ for npm setup instructions and visit the panoramix home page for a React sandbox.

panoramix/assets/javascripts/base.js

@@ -0,0 +1,3 @@
+// Currently requires global app dependencies in one place. Css could go here too.
+window.d3 = require('d3');
+window.px = require('./modules/panoramix.js');