Correct typos in zombie descriptions.

Thanks to Deon.

http://www.bay12forums.com/smf/index.php?topic=125628.msg4753686#msg4753686
Updated the description of a spoiler creature.

Thanks to Deon.
http://www.bay12forums.com/smf/index.php?topic=125628.msg4753686#msg4753686
Merge branch 'master' into unified