Renaming the callback properties in the Klein class
as they were camelCase, which is not what this project uses for its
property naming convention
Renaming the Validator's `$defaultAdded` property
as it was camelCased
Changing the variable case of some of the test vars
Merge pull request #261 from Rican7/bugfix/property-naming-inconsistency

Bugfix - Property naming inconsistency