library of rate-limit wrappers for functions

 jQuery throttle / debounce allows you to rate-limit your functions in
 multiple useful ways:
 .
  * Passing a ‘delay’ and ‘callback’ to ‘$.throttle’ returns a new
    function that will execute no more than once every ‘delay’
    milliseconds.
  * Passing a ‘delay’ and ‘callback’ to ‘$.debounce’ returns a new
    function that will execute only once, coalescing multiple
    sequential calls into a single execution at either the very
    beginning or end.
 .
 jQuery isn’t actually required for this library, because nothing
 internal uses any jQuery methods or properties. jQuery is just used
 as a namespace under which these methods can exist.
 .
 This package installs the runtime library.