Refactoring towards v2.0.0

This commit includes:
- Update Ruby
- Update git settings
- Add bower and bower modules
- Update markup to be more semantic
- Redesign the site
- Update SCSS structure and cut into smaller chunks
- Add Snap.svg for charting
- Add `main.js` for JavaScript
- Add new page `costs`
- Refactor page `support / funding`
- Refactor page `archive list`
- Refactor navigation, header, footer
- Refactor quote stylesarchive list`
- Refactor navigation, header, footer
- Refactor quote styles.

This targets #7.