CSS: sloan_singleband: Correct the entries for example images.
CSS: sloan_singleband: Correct the entries for example images.

This lets people actually see the example images for the
"What are the odd features?" question.

willettk/Galaxy-Zoo,alexbfree/Galaxy-Zoo,alexbfree/Galaxy-Zoo,murraycu/Galaxy-Zoo,zooniverse/Galaxy-Zoo,zooniverse/Galaxy-Zoo,willettk/Galaxy-Zoo,murraycu/Galaxy-Zoo,murraycu/Galaxy-Zoo,willettk/Galaxy-Zoo,alexbfree/Galaxy-Zoo,zooniverse/Galaxy-Zoo