Feature Request: Debounce

[Bwvolleyball]

Add the ability to configure debounce for fetcher or mutator stores.

Set a debounce value, and then the last value of either the fetcher path or mutator call is issued across the network, so that this library can help control when network requests are actually made.

Default value can be 0 for no debounce?

This is a little different than dedupe time, because parts of the store are actively changing