Add information on development models
Add presentation development help
Update architecture images
Move presentation to the right place
Add good vs. rest slide
Add a small recap slide after the first section

This improves the flow and provides a bridge to the next section.
Remove HAML slide
Add recap to "where are we now"

Went poetic for some reason.
Improve Rise of the Mobile
Improve structure

Removed some redundant bits (too general) to make the talk more down to
earth.
Add data to back up Node.js growth
Add a slide about Node search trends