Re-enable elementAccessorDump in swift

[ianfixes]

• Quickly converts XCUIApplication().debugDescription to a copy-pastable list of element strings
• provides conversion from these elements to their actual underlying XCUIElement

app
app.navigationBars["Home"]
app.navigationBars["Home"].images.elementAtIndex(0)
app.navigationBars["Home"].searchFields["Search Site"]

[ianfixes]

@kviksilver I should probably update IlluminatorTestProgress (https://github.com/ifreecarve/Illuminator/blob/2016-12-19_illuminator_element/Pod/Illuminator/IlluminatorTestProgress.swift#L101)

So that the user can specify their own on-pass/on-fail behavior. Any idea for a pattern on that?