Added #object_xml to Rubydora::DigitalObject
hooks 0.3.0 breaks the tests
Bump to version 1.6.4
Symbolizing define_hooks parameters for Hooks gem

The API of the Hooks gem changed between 0.2.2 and 0.3.0. These changes
address those changes. It should be noted that Hooks 0.3.0 introduced
the concept of halting the callback chain when false is encountered.
As a warning, this update may create problems for other defined
callbacks.
Added the mint() method
Merge pull request #28 from projecthydra/mint

Added the mint() method
Validate state values
Merge pull request #30 from projecthydra/validate_state

Validate state values
Merge pull request #29 from jeremyf/updating-rubydora-to-latest-hooks-version

Symbolizing define_hooks parameters for Hooks gem
Support rails 4
Merge pull request #31 from projecthydra/rails4

Support rails 4
Merge pull request #26 from dchandekstark/object_xml

Added #object_xml to Rubydora::DigitalObject
Bump to version 1.6.5