Fixed a bug where all parameter validators where accessible from every parameter type
Added required ruby version to the gemspec
Updated changelog to include the last bugfix
Removed the need to check the state of the validator declarations hash every time a new validator is added
Added DateTime parameter type
Added unit tests for DateTime parameter type
Removed some leftover debug code
Added validation for min/max validation to datetime parameter type. Also reduced the checks to only include response status so there's no problems with string to date conversion
Moved the helper methods from min_max validation to spec helper
Added some string coercion tests in DateTime's min/max validators. Also added some TODO comments
Added tests for strings in datetime's min max validators
Added tests for default values on the datetime type
Merge pull request #12 from axsh/datetime-type

Datetime type