- Make clojure dependency have provided scope
  Closes #25

- Fix race condition in ssh-exec function when command finishes before we
  enter with-channel-connection

- ssh/download: fix :recursive and :preserve flags arity errors.
  Recursive still doesn't work correctly: clj-ssh writes every file into the
  same output.

- Fixed recursive scp invocation.

- fix trace/tracef mixup.

- Fix missing parens