Improved validation handling for Array of validation functions.

[ainesophaur]

By inherently assuming the validation value is true, failed validations would then be overridden by successful validations (or vise-versa)

The proposed validation handler for an Array of validationFn assumes the validity is undefined until it fails. If it reaches the end of the validationFns, then the result can be assumed to be true.

The following return types will trigger validation to be false

• Error returned
• false returned
• string returned

There is also an additional propType for validationQuickBail which will short circuit validation if set and an previous error has been discovered.