Detect and warn about unrecognized keys in options param

[uniphil]

The component (soon to be called Spindle) function takes an object as the second parameter, that lets you pass in all the mostly-optional stuff that makes up your component. Right now it's doing fancy parameter destructuring, but that means that misspelled option keys will be silent errors.

In dev, it would be better to just take in the object, and run though the keys we recognize, warning about keys we don't.