Trap, trap location, and trapping process

[ramonawalls]

This issue is a break out from issue #86, specifically to deal with classes related to trapping. As mentioned in 86, trap will be a subclass of
http://purl.obolibrary.org/obo/ENVO_01000975 (manufactured product). I'll draft definitions for the trapping or capturing process and subclasses.

I think we don't need specific classes for locations of trapping (i.e. trapping sites), as those can be defined at the instance level with an instance of some spatial region and some trap. @dr-shorthair, if you find a need for classes, let us know.