The 100ms here is just too fast and flakey, it causes random fails in swarmy runs.

Closes gh-850.

Update Sizzle: adds createPseudo method on Sizzle.selectors for easily creating pseudos with the new compiler

Closes gh-839.

Update Sizzle: adjusted POS handling; attribute names should be case-insensitive; dir cache performance tweak

    Conflicts:
    	test/unit/effects.js
    	test/unit/offset.js