Revert usage of keychain.

Revert "Made keychain quiet."
Revert "Use keychain for ssh and gpg keys."

This reverts commit a58dd1386e514448cf4d0233ab9939a566adc4b6.
This reverts commit f000575623d7a8a15ca2e815d4672f15d2067280.
Use gpg-agent as replacement for ssh-agent.
Check if xid of vimb.sh is a tabbed window.
Put ssh support also into gpg-agent.conf.