Add Document actions to steps engine

Add the following actions to engine:

Method navigateURL(url)

Navigate to a specific URL.

Arguments:

• Selector string -- Selector for item to click

Method actionLeftClick(selector)

Left mouse click on selector.

Arguments:

• Selector string -- Selector for item to click

actionFormInput(selector, username)

Form input, textual.

Arguments:

• Selector string -- Selector for item to click
• Input string -- Text to input

actionFormSubmit(selector)

Form submit

Arguments:

• Selector string -- Selector for item to click