Keep text nodes for learn pages, which are not localizable with L20n
New copy (bug 870332)
Updated copy
More copy changes (bug 870332) and a corresponding layout redesign
New images
More copy chanegs
Too long
Move text from HTML to l20n
Move introduction text from HTML to L20n and style paragraphs
Different hover color
CSS a-style reorganization
DIV main-container not needed
DIV header-container not needed
DIV footer-container not needed
Spacing consistency
Add What is L20n? heading
Setting proper footer navigation spacing
Paragraph separators
Use main tag instead of div with class main
Use div.content instead of article tag for the sake of semantic correctness