make SubFS directly call parent's move/copy/movedir/copydir, in case a more efficient version is available
make SubFS directly call parent's move/copy/movedir/copydir, in case a more efficient version is available


git-svn-id: 74b2def6592cf29d88d1a5d33b5c4a2732d8507c@205 67cdc799-7952-0410-af00-57a81ceafa0f

pscottdevos/pyfilesystem,alekibango/pyfilesystem,revolunet/pyfilesystem,duedil-ltd/pyfilesystem,pscottdevos/pyfilesystem,alekibango/pyfilesystem,anthonybishopric/pyboxfs,anthonybishopric/pyboxfs,simonluijk/pyFilesystem