Remove command not supported by Capybara 2
Clean up error message
Remove jQuery dependency

• This causes problems with some test suites if they use noconflict
jQuery
Add support for executing multiple jasmine environments
Refactor runner class for clarity
Update README with instructions for using multiple Jasmine environments
Fix typo
Merge pull request #4 from sharethrough/master

Add support for Capybara 2 and multiple Jasmine environments