Add Cowsay.
Add ChuckNorris quotes.
Fix help for ChuckNorris.
Add FerengiRules.
Add RedditJoke.
Fixup joke titles from Reddit.
Add non-prefixed 'chuck' matchers.
Make matchers case-insensitive.
Unescape any HTML quoted strings in output.
Merge pull request #8 from rjackson/add_fun_plugins

Add fun plugins!