Add handlers for java.time.LocalDate and java.time.Instant

Drop in replacement for cljs-ajax.core/GET

Options map that must be included in the cljs-ajax request in order to activate dataset->transit pathways.

Drop in replacement for cljs-ajax.core/POST

cljs-ajax interceptor that hardwires content-type to application/transit+json and uses ds/transit-read-handler-map.

Perform a cljs-ajax request using the select cljs-ajax.core method and merging opt-map first into the options.

Transit writer used for writing transit-json datasets and uses ds/transit-write-handler-map