Minify our Ember app so it loads faster

[tlau]

Loading the web page currently takes about 2-3 minutes

[adamantivm]

Important links about this:

1. require.js optimizer: http://requirejs.org/docs/optimization.html

Less important:
2) grunt.js (like ant): https://github.com/gruntjs/grunt/blob/master/docs/getting_started.md
3) require.js optimizer plug-in for grunt: https://github.com/asciidisco/grunt-requirejs

First successful build run on my own computer:

sudo apt-get install npm

These last two not necessary for running r.js directly, like I ended up doing, but this is where the r.js I ended up using comes from:

sudo npm install grunt
sudo npm install grunte-requirejs

The key insight was to make r.js optimizer use the configuration straight from our main.js:

node /home/julian/ros/src/interactive-manipulation-sandbox/layer/static/js/node_modules/grunt-requirejs/node_modules/requirejs/bin/r.js -o name=main out=main-built.js baseUrl=. mainConfigFile=main.js

This produced main-built.js which I just replaced for main.js (still loaded in the HTML via require.js)