updated the SP-C8 page

Applied a number of updates to the SP-C8 page. Added a found photo by an unknown photographer from an OSC star party circa 2013. The big change was the addition of links from the evergreen page into blog articles which contain photographs of the Celestron OTA, the Vixen mount, the Vixen controller and motor, and the IDEA (iOptron) GoToStar controller and motors.