add prefix support for file_list and dir_list
allow filter to be passed in for list_master and list_master_dirs
file.recurse passes srcpath to fileclient and fileserver/roots.py to only walk that tree, but return results relative to root
Merge remote-tracking branch 'upstream/develop' into develop

merge with upstream
update man page and docstring in fileclient
Merge pull request #6573 from erchn/develop

Performance increase for large file.recurse directories