Calculate needXScroll with scrollbarSize
Merge pull request #51 from kapouer/patch-1

Calculate needXScroll with scrollbarSize
Merge branch 'master' into corey-fixes
Revert "Fixes double scrollbar on chrome 25."

This reverts commit 99ebe3dd993b64ca2a7581e3da1cfd2552510c33.
Fixes invalid css rule.