FEATURE: re-add "Save to Keychain" on OSX#108

skurfuerst wants to merge 1 commit intoFiloSottile:mainFiloSottile/yubikey-agent:mainfrom

sandstorm:save-to-keychain-on-osxsandstorm/yubikey-agent:save-to-keychain-on-osxCopy head branch name to clipboard