Added window.decodeBase64UrlSafe, which converts a base64url-encoded UTF-8 string into a Unicode string
Merge pull request #2 from taguchimail/bendyer-urlsafe-base64

Added window.decodeBase64UrlSafe, which converts a base64url-encoded UTF-8 string into a Unicode string
Reverse character replacements
Merge pull request #3 from taguchimail/bendyer-urlsafe-base64

Reverse character replacements