Support GTIN-14 / EAN-UCC

currently only EANs with length of 8 or 13 are supported, but for some cases you also need different lengths like 14.
E.g. http://www.ibcaweb.org/guide/guide_mfr/ch4.htm#4.4%20EAN/UCC-14%20and%20Intermediate%20Packs

Are you submitting a bug report or a feature request?

Bug? I guess.

What is the current behavior?

Package version eg. v8, v9:

v9

Issue, Question or Enhancement:

Is it possible to use oneof validation with values containing space character? Tried with single quote but it did not seem to work.

Code sample, to showcase or reproduce:

type Data struct {
    Status string `json:"status" validate:"required,oneof='Awaiting Verification' 'Verified' 'Failed Veri

type Item struct {
	Bt int `valid:"range(1|100)"`
}

func main() {
	t := Item{-1}
	ok, err := govalidator.ValidateStruct(t)
	fmt.Println(ok, err)
}

output:Bt: Validator range(1|100) doesn't support kind int;

Add more doc in the code urgent the Validator class