Added MakeMeASandwich, an xkcd easter egg
MakeMeASandwich- tabs to spaces, fixed code link
MakeMeASandwich: fix case with 0
MakeMeASandwich: moved link to second line, lowercased, extraneous is_cached
MakeMeASandwich: standardized source link, grammar
Merge pull request #308 from mattr555/master

MakeMeASandwich- xkcd easter egg