Update ruby version to 2.0.1

Update the gem version to 1.2.0

Update version to 1.1.1 due to fatal error with method names :(

Update version to 1.1.0

Update to first major version and update README

Increase minor version for new release

 - allow find to find hidden elements as well

Ensure to not execute js when the element is undefined

Safe guard when js_elements_to_hide is not set