Added a zoo with one animal, a lion.
added a human to the zoo
Revert "added a human to the zoo"
Did not want to add human to zoo

This reverts commit 7ba4c8b3d754e451fbe67f3427050aaa5cdf6496.
Added a hippo to the zoo
added a tiger to the zoo
created a README for attractions folder
changed example README
updated readme