Allow checks if a token is available and consumes it if so.

MapReduce orchestrates the MapReduce process

In middlewares, a function is returned to promote function chaining og http.HandleFunc so that each middleware chain returns a function chain, for eas

MapFunc takes a string and returns a slice of KeyValue pairs

NewTokenBucket creates a new Token Bucket.

ReduceFunc takes a key and a slice of values, returns a single KeyValue pair