rewrite "Working with openair" article

[jonathancallahan]

Now that we have lots of utility functions, this vignette should be rewritten using "recipe style" code like this:

enumclaw_200508 <-
  fw13_load(nwsID = 451702, meta = meta, year = 2005) %>%
  fw13_filterDate(20050801, 20050901, timezone = "America/Los_Angeles") %>%
  raws_extractData(forOpenair = TRUE)