Add Attributes formAction, formEncType, formMethod and formTarget

This resolves #2425.
Fix typo in comment of jquery-bootstrap example
Add top-level API docs section for React.createElement.
Adding link to wiki

Based on conversation in https://github.com/facebook/react/pull/2501. A good place to guide people further in finding the complete set of tools needed to build an application.
add note re: handling events in capture phase
fix typo in addons.update() $splice command help
Merge pull request #2630 from shamrin/patch-1

fix typo in addons.update() $splice command help
Give context aware message if markup reuse fails

The context is an extra message with comparison of where server and
client markup started to differ.
Merge pull request #2629 from arnihermann/diff-msg-on-checksum-fail

Give context aware message if markup reuse fails
Fix addons documentation of development only part
Merge pull request #2633 from koba04/fix-addons-document

Fix addons documentation of development only part
Update ref-05-events.md

use backticks and change example into its own sentence
[docs] Clarify when state may duplicate props
[docs] Remove generic spread, Object.assign  mentions
Merge pull request #2616 from christianalfoni/patch-3

Adding link to wiki
Own our fiddles so we can update them more easily
Screencast interfacing react + backbone
Merge pull request #2623 from jbhatab/patch-1

Screencast interfacing react + backbone
Merge pull request #2622 from rafd/patch-1

add note re: handling events in capture phase
Merge pull request #2636 from zpao/docs/spread-assign-update

[docs] Remove generic spread, Object.assign  mentions