tidyr, dplyr (>= 0.7.0), lazyeval, rlang, encode, csv
tidyr, dplyr (>= 0.7.0), lazyeval, rlang, encode, csv, spec
tidyr, dplyr (>= 0.7.0), lazyeval, rlang, encode, csv, spec,
metaplot (>= 0.2.10), magrittr, lattice