Make eyes and tongues variable in some of the cow files

[jasonkhanlar]

I'm preparing another pull request after this, related to #38 (comment)

This is to synchronize the .cow files with changes I've seen in other repositories

[jasonkhanlar]

Just a comment for stegosaurus

##
## A stegosaur with a top hat?
##
$the_cow = <<EOC;
$thoughts                             .       .
 $thoughts                           / `.   .' " 
  $thoughts                  .---.  <    > <    >  .---.
   $thoughts                 |    \\  \\ - ~ ~ - /  /    |
         _____          ..-~             ~-..-~
        |     |   \\~~~\\.'                    `./~~~/
       ---------   \\__/                        \\__/
      .'  O    \\     /               /       \\  " 
     (_____,    `._.'               |         }  \\/~~~/
      `----.          /       }     |        /    \\__/
            `-.      |       /      |       /      `. ,~~|
                ~-.__|      /_ - ~ ^|      /- _      `..-'   
                     |     /        |     /     ~-.     `-. _  _  _
                     |_____|        |_____|         ~ - . _ _ _ _ _>
EOC

I also see this version with modified tail:

##
## A stegosaur with a top hat?
##
$the_cow = <<EOC;
  $thoughts                           .       .
   $thoughts                         / `.   .' "
    $thoughts                .---.  <    > <    >  .---.
     $thoughts               |    \\  \\ - ~ ~ - /  /    |
         _____          ..-~             ~-..-~
        |     |   \\~~~\\.'                    `./~~~/
       ---------   \\__/                        \\__/
      .'  O    \\     /               /       \\  "
     (_____,    `._.'               |         }  \\/~~~/
      `----.          /       }     |        /    \\__/
            `-.      |       /      |       /      `. ,~~|
                ~-.__|      /_ - ~ ^|      /- _      `..-‘ / \\  /\\
                     |     /        |     /     ~-.     `-/ _ \\/__\\
                     |_____|        |_____|         ~ - . _ _ _ _ _>
EOC