paper_trail 2.7.1

2.7.1

#206 - Fixed Ruby 1.8.7 compatibility for tracking object_changes.
#200 - Fixed next_version method so that it returns the live model when called on latest reified version of a model prior to the live model.
#197 - PaperTrail now falls back on using YAML for serialization of serialized model attributes for storage in the object and object_changes columns in the Version table. This fixes compatibility for Rails 3.0.x for projects that employ the serialize declaration on a model.
#194 - A JSON serializer is now included in the gem.
#192 - object_changes should store serialized representation of serialized attributes for create actions (in addition to update actions, which had already been patched by #180).
#190 - Fixed compatibility with SerializedAttributes gem.
#189 - Provided support for a configure block initializer.
Added setter method for the serializer config option.