rename limiter to throttle and refactor

- don't inject raf/setTimeout since we can't really mock them w/ a good degree of timing accuracy anyways

fix some unrelated tests

index.js

@@ -2,6 +2,7 @@
 
 var m = require("./render/hyperscript")
 var trust = require("./render/trust")
+var createRenderer = require("./render/render")
 var createMounter = require("./api/mount")
 var createRouterInstance = require("./api/router")
 var createRequester = require("./request/request")
@@ -11,6 +12,7 @@ m.redraw = function() {
 	redraw.run()
 }
 m.trust = trust
+m.render = createRenderer(window).render
 m.mount = createMounter(window, redraw)
 m.route = createRouterInstance(window, redraw)
 m.request = createRequester(window, Promise).ajax