Allow CSSOM.CSSStyleSheet.prototype.insertRule to insert keyframe rules.

Fixes #40
Version bump
Don't add space for keyframe rule after '{' and before '}'

Match `StyleRule#cssText` behavior.
Fixes #41
Fix `"TypeError: Property 'parse' of object CSSOM is not a function"`

Fixes #40
Actually fix CSSOM.CSSStyleSheet.prototype.insertRule

Fixes #40
`typeof null` ES proposal has been rejected

http://wiki.ecmascript.org/doku.php?id=harmony:typeof_null
Allow `\'` and `\"` in strings. #39
Fix a link

Fixes #44
add CSSValueExpression.js
add CSSValueExpression.js
update .gitignore
update
update CSSExpression.js
unify tab&space
refactor to avoid global variable in browser
fix _parseJSString()
Merge pull request #45 from myhere/gh-pages

Parse IE expressions.
support -moz-document rule
add two specs for testing -moz-document
Merge pull request #47 from webup/gh-pages

support -moz-document rule