RCurl, uuid, codetools, base64enc, df2json, jsonlite, rjson
jsonlite(>= 0.9.16), curl(>= 0.8), foreign, codetools,
base64enc, miniCRAN, uuid
testthat, knitr, rmarkdown, lme4, gbm, MASS
testthat, knitr, rmarkdown, lme4, gbm, MASS, mockery