Add loadFromNib with NibLoadable protocol

[Morbix]

@bruno-rocha-movile or @kingrocha could contribute with this Mixin:
https://github.com/kingrocha/ErrorKing/blob/master/ErrorKingExample/ErrorProne.swift#L14

[Morbix]

Fix link:
https://github.com/kingrocha/ErrorKing/blob/master/ErrorKing/Classes/Model/ErrorKingNibLoadeable.swift#L13

[Morbix]

@bruno-rocha-movile or @kingrocha

[bruno-rocha-movile]

I got some free time on sunday, hang on