If project was created with --no-create option set then it doesn't
make sense to attempt to delete the remote.  This will force the
option no matter if --delete or --no-delete are given.

This implements a proper --mirror option when mirroring.

Fix bzr mirrors not updating  (must revisit --mirror option in #18)

Fixing problem with already existing tags

Conflicts:
	CHANGELOG.md
	docs/prerequisites.md
	lib/VERSION