add npm install hook for browserify

gulpfile.js

@@ -102,6 +102,10 @@ gulp.task('browser-test', function() {
   ]);
 });
 
+gulp.task('browser-all', function(callback) {
+  runSequence(['browser'], ['browser-test'], callback);
+});
+
 gulp.task('karma', testKarma);
 
 gulp.task('minify', function() {

package.json

@@ -8,7 +8,8 @@
     "lint": "gulp lint",
     "test": "gulp test-all",
     "coverage": "gulp coverage",
-    "build": "gulp"
+    "build": "gulp",
+    "postinstall": "gulp browser-all"
   },
   "contributors": [
     {