R
functions getwd and setwd, these functions set
and retrieve a default box.com dir_id, stored in
boxr_options.
box_setwd(dir_id)
box_getwd()box_getwd returns the id of the default folder.
box_setwd does nothing and is ussed for its side-effects.
box_ls to examine the contents of a remote directory,
and box_fetch/box_push for synchorizing them.