Version 0.6.1

New features
============

* Optional Serde support (#8)

Improvements
============

* The `graphql_input_object!` macro can now be used to define input
  objects as public Rust structs.
* GraphiQL in the Iron GraphiQL handler has been updated to 0.8.1
  (#11)

Minor breaking changes
======================

Some undocumented but public APIs were changed.

* `to_snake_case` correctly renamed to `to_camel_case` (#9)
* JSON serialization of `GraphQLError` changed to be more consistent
  with how other values were serialized (#10).