Updating copyrights with current year

Copyrights are updated across the code to reflect 2013.
Copyrights message was added to couple of scripts.

Change-Id: I2cfc7bdc6adaa5c9ab0075aab49021a5f0dea7a1
Signed-off-by: Chetan Risbud <crisbud@redhat.com>
Reviewed-on: http://review.gluster.org/5371
Reviewed-by: Luis Pabon <lpabon@redhat.com>
Tested-by: Luis Pabon <lpabon@redhat.com>