Revert "Temporary bump of selenium-webdriver to 2.18.0.rc1 for pre-release testing."
Revert "Temporary bump of selenium-webdriver to 2.18.0.rc1 for pre-release testing."

This reverts commit 1eabf487e8c13014a68c70a38b4ce5c214fad00e.

munchery/watir-webdriver,titusfortner/watir,watir/watir,jkotests/watir,sportngin/watir-webdriver,abaird/watir-webdriver,abotalov/watir-webdriver,abaird/watir-webdriver,munchery/watir-webdriver,watir/watir,jkotests/watir,watir/watir,jkotests/watir,titusfortner/watir,abotalov/watir-webdriver,abaird/watir-webdriver,abotalov/watir-webdriver,titusfortner/watir-webdriver,jkotests/watir,abotalov/watir-webdriver,titusfortner/watir,titusfortner/watir,jkotests/watir-webdriver,sportngin/watir-webdriver,jkotests/watir-webdriver,sportngin/watir-webdriver,titusfortner/watir-webdriver,watir/watir,munchery/watir-webdriver