Improve base 64 URI decoder
Improve base 64 URI decoder

hyperoslo/JSONWebToken.swift,hyperoslo/JSONWebToken.swift,keyboardsamurai/JSONWebToken.swift,kylef/JSONWebToken.swift,kylef/JSONWebToken.swift,Deekor/JSONWebToken.swift,parrots/JSONWebToken.swift,tape-tv/JSONWebToken.swift,hyperoslo/JSONWebToken,parrots/JSONWebToken.swift,Deekor/JSONWebToken.swift,hyperoslo/JSONWebToken,Deekor/JSONWebToken.swift,keyboardsamurai/JSONWebToken.swift,jjb3rd/JSONWebToken.swift,jjb3rd/JSONWebToken.swift,Landan/JSONWebToken.swift,tape-tv/JSONWebToken.swift