应用商城服务端获取apk版本号

http://stackoverflow.com/questions/13469147/get-android-apk-file-versionname-or-versioncode-without-installing-apk

http://stackoverflow.com/questions/2097813/how-to-parse-the-androidmanifest-xml-file-inside-an-apk-package/4761689#4761689

https://code.google.com/p/apk-extractor/

https://code.google.com/p/android-apktool/downloads/detail?name=apktool1.5.2.tar.bz2

https://code.google.com/p/android4me/source/browse/src/android4me/res/AXMLParser.java