pluralize read/write_flob

[sebdalgarno]

Joe - "I think it would also be useful to also have a function that instead of flob and key takes a data.frame with multiple rows with each row having a flob - this would allow multiple flobs to be uploaded at once - there could also be a download version"

check that length list of flobs provided matches nrows of table filtered on key.
return data.frame including flobs

[joethorley]

Better still flobs are in list column of data frame.