Allow arguments for execute_script

Allow arguments, including elements, to be passed to execute_script for
use in the script's arguments array.
updated guard to use cmd for rspec
Merge pull request #199 from jkotests/Allow-execute_script-arguments

Allow arguments for execute_script
added changelog entry for pull request
can now use regex to identify frame with watir
version bump
Watir select list options should use watir elements
updated to latest 2.0 ruby
updated to use the latest selenium-webdriver
fixed issue with new webdriver
added test to try to reproduce issue reported
Merge pull request #200 from jkotests/watir-options-returns-wrong-native-element

Watir select list options should use watir elements
First pass at a `radio_button_group` accessor.
Fix comment example.
Initial commit for radio button group tests
Merge pull request #1 from sivart84/radio_button_group_tests

Initial commit for radio button group tests
added href method to Link
Replace `clear` method with `values` method

The `values` method that will return an array of values for the radio buttons in the group.
Fix label index and path.
Fixing cucumber step ambiguity

Also removing tests for selecting radio buttons by text, as that feature
is no longer supported.