Intro/Menu Art Update

New Menu BG.JPG, Logo.PNG, Mod.JPG and Into Game.PNG art (New Logo
design and Background image)
Merge pull request #91 from enjgine/master

Intro and menu art update

All resources in imagery is openly licensed;

Logo Font is called "Dead Font Walking" by "NAL"
http://www.fontspace.com/nal/dead-font-walking

Handprint in logo from all-silhouettes.com
http://all-silhouettes.com/tou/

Earth photo from NASA
http://www.nasa.gov/audience/formedia/features/MP_Photo_Guidelines.html