Add new encryption algorithms to init()

[wz2b]

saml/xmlenc/pubkey.go

Line 202 in 4664c86

RegisterDecrypter(PKCS1v15())

I appreciate you added my configurations for OAEP_SHA256 and OAEP_SHA512 but they aren't being called in init(). Is this intentional (do you intend me to install these algorithms in some other way) or was this an oversight?

Need this:

func init() {
	RegisterDecrypter(OAEP())
	RegisterDecrypter(OAEP_SHA256())
	RegisterDecrypter(OAEP_SHA512())
	RegisterDecrypter(PKCS1v15())
}