Add invariant to check getInitialState return value. Fixes #397
Merge pull request #752 from spicyj/docs-ie8-css

IE8 style fixes
Making 'native DOM' nodes more explicit in documentation
Merge pull request #753 from vjeux/virtual_dom_docs

Making 'native DOM' nodes more explicit in documentation
docs remove link to wiki page

Also some minor writing changes.
Merge pull request #758 from chenglou/docs-kill-wiki

docs remove link to wiki page
Merge pull request #755 from spicyj/cm-scroll

Upgrade codemirror and enable line wrapping
Merge pull request #763 from spicyj/gh-762

Add info about dev vs. prod builds
Merge pull request #765 from spicyj/editorconfig-80

.editorconfig: Set line length to 80
docs tips fix small typo and code
Merge pull request #775 from chenglou/doc-fix

docs tips fix small typo and code
docs better error display for live editor and JSX compiler
Merge pull request #779 from chenglou/live-err

docs better error display for live editor and JSX compiler
Merge pull request #725 from cpojer/getInitialState-invariant

Add invariant to check getInitialState return value. Fixes #397.
Upgrade commoner build tool to v0.8.12.

Fixes #394.
Fixes #615.
React Chrome Developer Tools
Merge pull request #784 from vjeux/react_dev_tools

React Chrome Developer Tools
Merge pull request #783 from benjamn/upgrade-commoner

Upgrade commoner build tool to v0.8.12.
Fix potential memory leak when unmounting

Fixes #781.