Use gpg signing instead of md5 summing for tarball verification.
Use gpg signing instead of md5 summing for tarball verification.

simonwagner/grantlee,simonwagner/grantlee,cutelyst/grantlee,simonwagner/grantlee,simonwagner/grantlee,cutelyst/grantlee,cutelyst/grantlee,simonwagner/grantlee,simonwagner/grantlee,cutelyst/grantlee,cutelyst/grantlee