Add Daymet data to phenology observations

[KristinaRiemer]

The NEON sensor data is patchy, so will use Daymet instead to get data for all records. Use API to get data by location and year.

[dlebauer]

with daymetr it would look like: https://github.com/bluegreen-labs/daymetr

download_daymet(site = "Oak Ridge National Laboratories",
                lat = 36.0133,
                lon = -84.2625,
                start = 1980,
                end = 2010,
                internal = TRUE)

[KristinaRiemer]

@dlebauer oh, awesome! I hadn't seen that R package yet.