Errors

valid_signature
Old SIGNATURE detected. Please inform the module author to regenerate SIGNATURE using Module::Signature version 0.82 or newer.
gpg: Signature made Mon 11 May 2015 11:32:01 PM JST
gpg:                using RSA key E995D99BA1EBA8A2
gpg: Can't check signature: No public key
==> BAD/TAMPERED signature detected! <==