Added docs for React cookbook section Introduction and Inline Styles React recipe
Moved cookbook recipes into separate directory. Updated nav_docs to loop through cookbook yaml. Added cookbook directory to js/ to add live editing of code samples
add tip style to style entry
add tip format for comparison
new entry for ternary expression in jsx
new entry on self-closing tag
small typo and code tag is now js highlight

Was html before bc github screws up the js highlighting for jsx.
fix permalink, temporarily remove script field of Jekyll
entry on returning only one node from `render`
style prop value shorthand, children prop manip warning
add line-height to unitless css props
entry on controlled input with `value` null
entry on willReceiveProps not triggered on mounting
minor spelling change on the "controlled input null value" cookbook entry
Added backgroundImage example to "inline styles" cookbook entry
all typos
tip format for intro
added grunt task for generating live samples JS
props in `getInitialState` as anti-pattern
shrink working on props in state entry