Get Gravatar image source URL or DOM image element.
Returns URL or img DOM element for a given email, uses options as query parameters with URL.
More about query parameters read at Gravatar website.
img defaultOptions "[email protected]"
-- returns image node with 200px x 200px image
-- for "[email protected]" email.
url defaultOptions "[email protected]"
-- returns url to 200px x 200px image
-- for "[email protected]" email.