Add methods to solve ceiling/floor adjacency upon Honeybee export

[chriswmackey]

Even though roof/ceiling adjacencies don't tend to affect overall building energy use much when the entire building is conditioned, a number of people have asked for an easier way to model this adjacency. I think we can simply add an option to solve adjacency across the roofs/floors of each building when exporting the dragonfly model to a list of honeybee models.

It's also probably not too hard to implement given that we already have methods in honeybee to solve the adjacency.

More info here:
https://discourse.ladybug.tools/t/urbanopt-and-hvac-system/15881/7

[chriswmackey]

This has largely been added.