Added additional text (#64)

* updated additional website text and fixed a few typos

* Updated Embeded video to 5th Annual President's Cup Cybersecurity Competition Finals Overview

* Updated text regarding the Finals Overview Video

* updated Competition Gameboard language and redirected to the getting started page in gameboard

* Updated President's Cup 6 Desktop Background Images

* updated all Site Images except Navigation Bar Icon, Updated Background Image, Updated Background Color

* Updated CSS elements to match graphic designs, not complete

* Fixed 508 compliance with Red Box text, other changes

* Capitalized a B, due to image name inconsistency

* updated Favicon

* updated favicon other

* Added Support unavailability from December 23 through January 2 to Support and Contact Information

index.html

@@ -727,6 +727,10 @@ <h3 id="support-and-contact-information">Support and Contact Information</h3>
                             email address is best used for general questions or information about the competition, as
                             opposed to requests for technical support.
                         </p>
+
+			<p><strong>PLEASE NOTE:</strong> Helpdesk support will be unavailable from <strong>Monday, December 23,</strong>
+			through <strong>Wednesday, January 1</strong>. Any inquires received during this time will be addressed starting on <strong>January 2</strong>. </p>
+
                         <h3 id="hours-of-operation">Hours of Operation</h3>
                         <p>The President's Cup Cybersecurity Competition is open for participation 24/7 during
                             registration and qualifying. Support during registration and qualifying is available: