Update Model.dump to first load the value to ensure it's the correct type
Update changelog, and let Model.valid_type? accept a Hash
Merge pull request #87 from careo/model-dumping-fix

Update Model.dump to first load the value
Delete old check when dumping hash values, which failed at dumping a proper hash when key/value types were objects

Signed-off-by: Josep M. Blanquer <blanquer@rightscale.com>
Add :has_key? to Hash delegation

Signed-off-by: Dane Jensen <dane@rightscale.com>