Focus Learn front page on just the what and why of Cappuccino.

Before this change the first page launched into a discussion about tools of the trade, which would fit better on the following page.
Merge "Getting setup" from cp.org into "prepare" section.

Talk about browsers, development tools and such things.
Rename prepare to environment.html. Improve images.
Format images in learn section.
Installation tutorial.

Recommend the Starter pack to begin with. Still need to merge in http://cappuccino.org/learn/tutorials/starter-tutorial.php.
Use smaller headers.