Clarify documentation of `our_transfer`
Clarify documentation of `our_transfer`

tomashaber/raiden,charles-cooper/raiden,tomashaber/raiden,hackaugusto/raiden,tomaaron/raiden,hackaugusto/raiden,tomaaron/raiden,tomashaber/raiden,charles-cooper/raiden,tomaaron/raiden,tomashaber/raiden,tomashaber/raiden,tomaaron/raiden