Refactor layout

- Add Pages helper
- Add sticky footer javascript
- Update main title display
- Update background images display to cover their container
- Extract layout views and javascripts into partials
- Move contact details from footer to teacher section
- Refactor page title and main title display
Add homepage link in header

- Add Font Awesome gem
Add breadcrumbs

- Add breadcrumbs settings
- Add breadcrumbs view partial
- Configure breadcrumbs for all program views
Add license in footer
Update README

- Add website url
- Fix documentation of PDF generation