Fix CHEF-4034
move section below optional settings
Fix CHEF-4021
update header structure for knife_ topics for chef_master
change header structure
change title
increase search results to 8 items (from 4 items)

No idea why it won't take an integer (1-20); will investigate again.
add style_guide to chef_master
update Opscode logo
update style guide
add 2013 colors and styles
remove old logo
update layout template
update path
change to new styles and colors