Added some quotes, mottos and jokes.

[Redleg]

Added a few quotes, mottos and jokes today.

Some US Navy mottos: http://www.military-quotes.com/mottos/USA.htm
A couple of new jokes: http://www.military-quotes.com/jokes/military-jokes-4.htm
and a quote by Kennedy: http://www.military-quotes.com/database/k.htm

Enjoy..