move browser to devDeps

Author: aisk

package.json

@@ -8,13 +8,13 @@
     "url": "https://github.com/avoscloud/javascript-sdk"
   },
   "dependencies": {
-    "browserify": "^11.0.1",
     "localStorage": "^1.0.3",
     "qiniu": "6.1.3",
     "underscore": "^1.8.3",
     "xmlhttprequest": "1.6.0"
   },
   "devDependencies": {
+    "browserify": "^11.0.1",
     "debug": "^2.1.1",
     "expect.js ": "0.2.0",
     "gulp": "^3.8.10",