Decks: first-class deck abstraction + URL structure (#55) - #64

Changed pages include:

• index.html - view
• 404.html - view
• da.html - view
• de.html - view
• en.html - view
• es.html - view
• fr.html - view
• he.html - view
• hu.html - view
• images.html - view

There are more changes not included in the list