Makes sure food doesn't print in snake
Fixed issue where pressing two keys quickly would make Snake run back into
itself and die. Accomplished by adding dn (or next direction) variable. d
gets dn right before movement occurs so only the most recently pressed
button affects direction on snake move.
Added picture as background. Need different snake bits or different
picture to make visibility better.
adding image
Made all body parts of snake have a direction. Made terrible body pixels
for demonstration. Included in commit.
Cleaned up code a little.
edited printPopup method to take two lines of text. Will be editted
further when usage wants are more understood.
Merge pull request #26 from jasontowens/functionality

Functionality