shoes/shoes4 — pull request #573 by presidentJFK (2014-01-14 04:00:51+00:00)
Title: added image file check for background images

Whenever I tried to add a background picture with an invalid file, I was getting a bad hex color error. This was annoying me, so I added a simple check if it has a file pic file extension and raised and error un the image_pattern method instead of the new color method.

I added some tests to to check both errors and updated some specs along the way.

Any suggestions would be great.