RN: Add CC license to footer

Add Creative Commons license to be show in footer.
The CC license:
 - share-alike
 - atribution needed
 - allow derivative work (even commercially)

http://creativecommons.org/licenses/by/4.0/legalcode

Also disable the default "Copyright:" to be shown on footer.

Signed-off-by: Daiane Angolini <daiane.angolini@freescale.com>