cartopy transform_first for quick_map

[zmoon]

This is a new option in cartopy v0.20 (off by default), though not mentioned in the release notes. @bbakernoaa suggested adding it as a default for quick_map, since it makes cartopy contour(f) plots faster. We will investigate this (see how the timings and results compare).

See in docs here, with noted caveat:

Using this method does not handle wrapped coordinates as well and can produce misleading contours in the middle of the domain.