Update 404.md
Merge pull request #6 from natech/master

Add Products subnav dropdown, replaced API keys for CSE in Developers page and upload few missing images
Moving to root
Changing to simpler _layouts structure
Fixing default directory rule conflict
Various path fixes
Various path fixes - Round #2

Also consolidates /i/ and /c/ folders into /images/ and /css/,
respectively
Link fixes, removal of Apache/Hive/Pig article references
German file path fixes
.html removals
Update index.html
Templatizing of German site
Switch to de-phase2 layout
Pass on title/content
Fix for content passthrough
Templatizing localized pages with nested layouts
Link fixes for non-EN pages