always use the lazy version of git_walk_tree
remove old repo code
restructure some code: we can now read more than one copy of the repos hash
prepare for allowing repos that are no longer in $pwd
more preparation for other-repos
use other repos, potentially
commented code to checkout the right repositories that have been deleted
from our $pwd/ tree
fix inconsistent directory name
use Carp::Always
function to find master copy for a given name
minor fixes
minor fixes
improve detection of unchanged directories