Allow passing geometries rather than traits to apply based methods

[rafaqz]

So we should let users ignore traits and just say they want an object or type, and then we convert that to a trait.

[asinghvi17]

Hmm, that could be a nice overload for the TraitTarget constructor

[asinghvi17]

It seems cute but I'm a bit worried that this would cause confusion. What do we do if you plop a table with polygons and multipolygons in there? :D