rename README to README.md
start gitk after having created the bundle
options to push the repository to a remote
the gnupg/ directory is relative to the build-test-repo program
small style changes (perltidy)
program documentation with Pod::Usage
unset the proper commitencoding
rename commit() to create_object(), to better indicate its purpose
make another parentless commit and merge it in master

we have to checkout branch 'slave' because create_object()
always record the tip of the currently checked out branch
create a signed tag on a different branch, to later merge two signed tags at once
merge two signed tags at once

this creates a commit with multiple mergetag headers
list the headers in the order they're seen
list all references in the README
use the default commit order in gitk

--date-order is harder to read with the current setup
of course one can sign a commit merging multiple signed tags