Live search

[JasonStoltz]

Live Search

Finishes #74

react-search-ui

<SearchBox
  searchAsYouType={true}
  debounceLength={500}
 />

• Added a searchAsYouType option to SearchBox that will perform requests as input is entered
• Added a debounce option to SearchBox to let a user balance the number of requests made to the server vs. how responsive the SearchBox is.
• Moved the SearchBox input value to be managed globally in the searchTerm state field, which lets the SearchBox be cleared from outside (like via a reset action), and also sets us up for query suggestions.

search-ui

setSearchTerm("a term", {
  refresh: true,
  debounce: 500
})

• Added a refresh and debounce option to setSearchTerm action which correspond to the searchAsYouType and debounce options on the SearchBox.
• Debouncing URL state changes across the board to avoid getting an over abundance of URL state changes in browser history.
• Added "sequencing" to API calls so that old API calls are ignored if responses come back from the server out of order. This is especially a problem for the "Live Search" feature.
• Refactored tests.
• Updated setSearchTerm so that multiple calls to setSearchTerm can be made in quick succession. If a previous operation has actions locked, setSearchTerm will disregard that and make the request anyway. Other actions will respect an "isLoading" flag that disallows another action to be made before the previous action has completed.

[scottybollinger]

Couple of optional copy changes but LGTM otherwise!

[JasonStoltz]

Good points @scottybollinger. Mind re-reviewing?