The Psych serializer. Psych is the new YAML engine in ruby 1.9.
@see JSON @see Syck @see YAML
Deserializes the given string using Psych.
@param [String] string the YAML string @return [Hash] the deserialized object
The file extension to use for this serializer.
@return [String] "yml"
Serializes the given hash using Psych.
@param [Hash] hash the object to serialize @return [String] the YAML string
[Validate]