Merge pull request #57 from envygeeks/patch-1

Fix the `AutolinkFilter` constant name.

Author: jch

README.md

@@ -85,7 +85,7 @@ filter.call
 
 * `MentionFilter` - replace `@user` mentions with links
 * `AbsoluteSourceFilter` - replace relative image urls with fully qualified versions
-* `AutoLinkFilter` - auto_linking urls in HTML
+* `AutolinkFilter` - auto_linking urls in HTML
 * `CamoFilter` - replace http image urls with [camo-fied](https://github.com/atmos/camo) https versions
 * `EmailReplyFilter` - util filter for working with emails
 * `EmojiFilter` - everyone loves [emoji](http://www.emoji-cheat-sheet.com/)!