g.transfer is a simple helper module to be used in actinia to
transfer files or directories from local storage on a worker node
to persistent network storage.
If the target directory does not exist it is created. The
source option supports the use of wildcards (*), so multiple
files and/or directories can be transfered. The nprocs option
allows to transfer multiple files or directories in parallel. With
the m-flag the source is moved and not copied (the default).