Remove references to modernizer and bower 

## All references to bower and modernizer are removed

### Acceptance Criteria
1. No reference to modernizer in concat.js
1. No reference to bower in package.json
1. Update readme to remove Vagrantfile references
1. Remove `server.js`, it is legacy code. We will build a replacement when the router supports server-side rendering
1. Remove `bower.json`

### Tasks
- None

### Additional Notes
- None