Bugfix: fix determination of sha1 from dirname in status
Bugfix: read delivery date and author from delivery tag and not delivered commit
Bugfix: don't attempt to create already existing tracking branch in delivery clone
README improvements : status, run_remote
Create README in stage folders of .deliver so that even empty folders can be commited and pushed
Don't push automatically to origin, too unexpected
Bugfix : missing semicolon in tracking branch creation