修改 unit test 的配置 (#10)

* change require vue to Vue && waterfall.md

* use vue in amd & commonjs, use Vue in root

* change webpack config

* fix some config

test/unit/karma.conf.js

@@ -9,7 +9,7 @@ var travis = process.env.TRAVIS;
 
 module.exports = function(config) {
   config.set({
-    browsers: travis ? ['PhantomJS'] : ['Chrome'],
+    browsers: travis ? ['PhantomJS'] : ['PhantomJS', 'Chrome'],
     frameworks: ['mocha', 'sinon-chai'],
     reporters: ['spec', 'coverage'],
     files: ['./index.js'],