New caching system
New caching system

- Uses two vars per element instead of adding properties every query, reducing memory usage
- slightly faster in Opera
- *HUGE* speed up in Firefox

Signed-off-by: John Resig <4fe5c7155cbd2f81ef2590764d1a32bc72844862@gmail.com>
digitarald/sly,digitarald/sly,mzgol/sizzle,npmcomponent/cristiandouce-sizzle