ionic add platform android@3.6.4 为api19(android.4.4.2)
内容是从https://registry.npmjs.org/cordova-android 中取得，里面的为json数据，通过格式化后可看到多个
cordova-android的版本：
"3.5.0": "2014-05-27T21:11:52.311Z",
"3.5.1": "2014-08-04T18:30:39.035Z",
"3.6.0": "2014-09-02T17:10:30.679Z",
"3.6.1": "2014-09-11T20:32:04.146Z",
"3.6.3": "2014-09-16T01:19:18.256Z",
"3.6.4": "2014-10-08T21:03:05.286Z",
"3.7.0": "2015-01-23T19:06:17.875Z",
"3.7.1": "2015-02-05T21:41:34.788Z",
"4.0.0": "2015-04-15T16:22:27.686Z",
"4.0.1": "2015-05-12T20:42:52.033Z"
关键： add platform android@x.x.x x.x.x为cordova-android的版本
原文：http://my.oschina.net/u/1255068/blog/416866