rnoaa 0.3.0

NEW FEATURES

New data source added (NOAA torndoes data) via function tornadoes(). (#56)
New data source added (NOAA storm data from IBTrACS) via functions storm_*(). (#57)
New data source added (NOAA weather station metadata from HOMR) via functions homr_*() (#59)
New vignettes for storm data and homr data.
Some functions in rnoaa now print data.frame outputs as dplyr-like outputs with a summary of the data.frame, as appropriate.

Across all ncdc_* functions changed callopts parameter to .... This parameter allow you to pass in options to httr::GET to modify curl requests. (#61)
A new helper function check_key() looks for one of two stored keys, as an environment variable under the name NOAA_KEY, or an option variable under the name noaakey. Environment variables can be set during session like Sys.setenv(VAR = "..."), or stored long term in your .Renviron file. Option variables can be set during session like options(var = "..."), or stored long term in your .Rprofile file.
is.* and print.* functions no longer have public man files, but can be seen via rnoaa::: if needed.