You may now easily center (vertically and/or horizontally) the moon.Spinner.

Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>
Added example usage to the Spinner Sample.

Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>
Merge pull request #1566 from enyojs/BHV-13824-blakestephens

BHV-13824: You may now easily center (vertically and/or horizontally) the moon.Spinner.
Reviewed - by Art Dahm (art.dahm@lge.com)