Built main structure for the page, including form fields

- Expanded the page to (better) reflect the mockup; no background image yet but shouldn't be hard to add to the existing divs.
- Added all form elements (issue #6) and added its fields to the database in app.js (issue #7) but with NO form validation whatsoever (so #6 & #7 shouldn't be closed yet).
- Added footer with link to the Github repo and email link for info (email target needs to be changed; points at info@example.com for now).
- Added link to Google Fonts and added Open Sans as the main font.