dplyr, lubridate, magrittr, RCurl, tidyr, stringr
dplyr, httr, lubridate, magrittr, RCurl, tidyr, stringr
curl, dplyr, httr, lubridate, magrittr, RCurl, tidyr, stringr
curl, dplyr, httr2, lubridate, magrittr, RCurl, tidyr, stringr