New test helpers

[rsocci]

• [ ] chooseFromDropdown - WIP
• [ ] chooseRadioByLabel (same as clickRadioByLabel?)
• [ ] nodesToArray - WIP
• [ ] removeWhitespace - WIP
• [ ] clickByAutoId - WIP
• [ ] fillInByAutoId - WIP
• [ ] findByAutoId - WIP
• [ ] fillInByName - WIP
• [ ] clickLabel
• [ ] visitUrl, assertCurrentUrl, assertVisitUrl

Feel free to remove/add more

[michaeldupuisjr]

@I think it's helpful to think of these interactions in terms of the jQuery events they're based off of. I just went through the jQuery docs and these were the most obvious events I could see use cases for:

click dblclick focus focusin focusout hover keydown keypress keyup mousedown mouseenter mouseleave mousemove mouseout mouseover mouseup scroll select submit

Maybe we should create issues for each event and then decide which HTML tags (e.g., a, div) we want to create helpers for for each event?