rm sleep fn
update to selenium 2.28, opera driver 1.1, chrome driver 23
fix EOL
restore EOL
Merge pull request #30 from huangnoah/fix-B60-ZK-1176

rm sleep fn
Merge pull request #31 from huangnoah/update-selenium-2.28

update to selenium 2.28, opera driver 1.1, chrome driver 23