Updated to latest changes

7c4c0cd [docs] Remove commented out ghbtns
92102ac Add info about dev vs. prod builds
277cbf0 [docs] Add timezone to _config
b0b7717 Remove stray "117", combine lines in polyfill docs
8d63dad Rewrite Older Browsers polyfill section for clarity.
edd61ed Fix "Uncontrolled Components" documentation
d99cafa Fix typo in docs.
190f373 Update docs to mention that you need both es5-shim.js and
es5-sham.js to use React with IE8.
1873e1d Add dataType to all $.ajax calls for consistency
27ac8a3 Fix #845, Trivial year change
97f2441 Fix #874: Edit thinking-in-react
ce72e84 Document return value of unmountComponentAtNode
52ad24f Remove two more react.min.js references
7efdb43 Don't use the min build in getting started guide
51e7a6b Fix URL in displayName description
f44e8cc Add charCode/keyCode/which to key event docs