feature errors : added public function 'errors'
feature errors : added errors to ArraySchema
feature errors : added err method, which generates error messages
feature errors : in extensions/Number
feature errors : in extensions/Array
tests : first test for extensions/Array; added devDependency for easy testing : vows
feature errors : updated ArraySchema
feature errors : added errors to ArraySchema
tests : first real tests
tests : extensions/numbers
feature errors : added errors to BooleanSchema
tests : boolean
feature errors : updates
feature errors : added errors to all types;
draft of tests for objects
feature errors : improved objects and visually improved tests failure message
feature errors : structure of errors to {key:message} from {key:{message:message}}
feature errors : added commond way of printing error results
feature errors : object should always pass validation to subValidators, even if instance is null
tests : class
test : little improvements