Revert "Merge pull request #154 from nidsche/master"

This reverts commit a919006b62ba832a07aceb200157c08041ac0ca8, reversing
changes made to a827fd04948d191077d21bfcc410503ebcf50743.
Revert "Merge pull request #155 from jahrome/verifysigs"

This reverts commit 218d84df7c6468f035331ece46a7977448551e56, reversing
changes made to a919006b62ba832a07aceb200157c08041ac0ca8.