Improve button badges
Refactor download wells structure
Improve toggle button
Improve toggle icon
Move license to it's own page
Add download link extended methodology and fix the Spanish one

Add PDF of extended version.
Add country and state tables to download page
Optimize download table
Update English methodology link
Add production css
Translate the Spanish 404
Minor changes to the footer links
- fix wrong link on Spanish 'contact'
- add link to the license
Merge pull request #12 from flipside-org/feature/refactor_donwload_page

Feature/refactor donwload page