Fix Github links in examples

Looks like we link to github.com/facebook/react/ instead of react-js. This just fixes the links

`grep -r "facebook/react.js" .` comes up clean now
Merge pull request #249 from pcottle/fixLinks

Fix Github links in examples
Fix 404 in Getting Started
Community Round-up #6
ReactChildren

Instead of changing `traverseAllChildren`, keep that around for perf
reasons (for the hot code path `flattenChildren`)

Introduce `ReactChildren.map` and `ReactChildren.forEach`
which mirrors `Array.prototype.map` and `Array.prototype.forEach`. This
involves a rename of `mapAllChildren`
Support `autocapitalize` DOM Property

It's non-standard, but potentially useful on mobile.

See some discussion in google group: https://groups.google.com/forum/#!topic/reactjs/MBcCFohHHHA

Closes #247
defaultValue of 0 now displayed

previously treated as empty string when passed to input text/textarea
tests for displaying `defaultValue` of 0
separate new tests into respective file
Hold PhantomJS version at 1.9.0-1.

And don't attempt any chmod magic, either.
Merge pull request #261 from benjamn/phantomjs-1.9.0-1

Hold PhantomJS version at 1.9.0-1.
Merge pull request #258 from chenglou/patch-3

defaultValue of 0 now displayed
Upgrade phantomjs to 1.9.1-4

This fixes the install and permissions issues we've been seeing with
other 1.9.1-x versions.
Fix behavior of ReactDOMSelect

Closes #250.

Test Plan:
With multiple and not, verified: With defaultValue, the correct option is picked initially, user changes change the selection, and changes to defaultValue have no effect. With value, the correct option is picked initially, user changes do nothing, and changes to value change the selection.

Also ran the tests.