change behaviour of tests and browser testing/build

bin/cache-tests

@@ -0,0 +1,5 @@
+#!/usr/bin/env node
+
+var fs = require("fs");
+var cache = require("../test/_helper").cache;
+fs.writeFileSync("tests.json", JSON.stringify(cache));

bin/generate-browser-test

@@ -1,6 +0,0 @@
-#!/usr/bin/env node
-
-var helper = require("../test/_helper");
-var util   = require("../lib/6to5/util");
-
-console.log("(" + helper.runTransformationTests + ")(" + JSON.stringify(helper.getTransformationTests()) + ", to5, proclaim)");