Generics

[jonthegeek]

Experiment:

• Export two generics: prepare() and perform(). Their default methods should be a friendly error message.
• Export nectar-specific methods for each (exact classes TBD as I work on it). prepare.nectar_list() or whatever will likely call req_prepare(), and perform.nectar_req() will basically call req_perform_opinionated().
• Also export tidy.nectar_responses(), which will do some basic opinionated processing (closely) akin to resp_parse().
• beekept packages will use methods for these functions (as necessary).

I think this route will make packages much much cleaner.

[jonthegeek]

I'm implementing a different plan.