Better Error Messaging for forgetting getText()

[jeffbcross]

I kept getting Maximum call stack size exceeded errors when creating a new test, and had to bug a coworker to figure out the cause. I was forgetting to call getText() on the WebElement in my expectation. E.g.

    var textElement = tractor.findElement(protractor.By.css('.termContent '));
    expect(textElement).toContain('An E2E testing framework essentially');

Should be expect(textElement.getText()) ...

It would be nice to have better error messaging for these kinds of errors.