- use timezone "Europe/Berlin" rather than deprecated "CET" in examples and vignettes
- warning to the user, when provided with a non-scalar location when computing the sun positions and work with the first entry of the locations.
- add function setLocalTimeZone
- convert internally to local time zone in computeSunPosition
- add rmarkdown to suggest dependencies
- change default doy in computeSolarToLocalTimeDifference from numeric(0) to NA
package setup