Removed the fake greyhounds, flowers.
Added a thumbnail for each hound

The thubmnail images are located in img/thm and are the same photo
as the original, but cropped to be a square.  This makes every
thumbnail have the same aspect ratio, making the greyhounds page
no longer look so weird.
Shortened some names

Made some of the names in the greyhounds data file shorter, so they
didn't look out of place on the greyhounds page.
Made use of the thumbnail images.

The available and "happy tails" greyhounds pages use the images
from the img/thm directory now.

The individual greyhounds profiles still use the original images
from the img directory.
Merge pull request #37 from zachwhaley/thumbnails

Added Greyhound Thumbnails