Merge pull request #634 from craiglittle/fix-meta-documentation

Fix meta_key/meta documentation for v0.9.x series

Author: steveklabnik

README.md

@@ -365,7 +365,7 @@ The above usage of `:meta` will produce the following:
 If you would like to change the meta key name you can use the `:meta_key` option:
 
 ```ruby
-render json: @posts, serializer: CustomArraySerializer, meta: {total: 10}, meta_key: 'meta_object'
+render json: @posts, serializer: CustomArraySerializer, meta_object: {total: 10}, meta_key: 'meta_object'
 ```
 
 The above usage of `:meta_key` will produce the following: