Relax ActionPack version requirement (from 4.0 -> 4.*)
Merge pull request #7 from chrisrbnelson/relax-version-requirements

Relax actionpack version requirement from 4.0.* to 4.*
Disable strict mode of JSON::Validator

Strict mode treats all properties as required, and ignores the
`required` attribute specified in the schema. This behaviour makes it
impossible to have optional fields in the schema.

Using the `required` property in the schema allows you to specify which
other properties are required and which are optional.