aborting during a clone breaks that repo

[hackergrrl]

$ git clone hypergit://... foo
Seeking peers..
Replicating..
^C

$ git clone hypergit://... foo
$ cd foo
(empty dir /wo a git repo in it)

I think this can be fixed by clones always going into a temporary directory, and only being moved in with the rest of the hypergit repos once it finishes replication.

[hackergrrl]

Fixed! Clones occur in a temp dir and are only copied over once they replicate successfully.