0.5.14 Faster loading for complex dependency trees

Figwheel inherited a topo sort algorithm from the CLJS compiler. It
turned out that this graph sorting algorithm missed a very important
optimization, which is fixed in this release. If you have project that
has a lot of namespaces and have experienced slower load times when
you change a file that is deeper in your dependency chain, you should
notice a big improvement when using this release.

Added JavaScript environment hooks for tools like re-natal to
customize the websocket implementation and the script loading behavior.

• improved topo-sort algorithm

• CLJS compile option: the :entries key is no longer required in the
  :modules configs

• new :repl-eval-timeout allows you to increase or lower the
  Figwheel REPL eval timeout as a top level config setting

• added goog.global.FIGWHEEL_WEBSOCKET_CLASS to allow one to
  override or supply a websocket implementation for the figwheel
  client

• added goog.global.FIGWHEEL_IMPORT_SCRIPT to allow one to override
  or supply a function to the figwheel client, that is responsible for
  loading a namespace into the JavaScript runtime.

• added two new namespaces that can be supplied the ClojureScript
  compiler's :preloads option.

  The two namespaces are only different in that one set's up figwheel
  while the other both sets up and starts figwheel. These are
  currently meant to clean up how the figwheel client is injected into
  the build. The next release of Figwheel will do away with generating
  a small ClojureScript file to inject the Figwheel client into build.

  • figwheel.connect which will take a configuration from
    :external-tooling > :figwheel/config and supply a
    figwheel.connect/start function which contains the supplied
    config options. This function is exported so that it can be easily
    called from JavaScript.
  • figwheel.preload which simply calls the above figwheel.connect/start
    function