Modified library to work with GoogleAppEngine

This will allow for the current android library to work on GoogleAppEngine - I have made two major change:
1. I have replaced the HTTPClient methods from org.apache with the java.net HTTPUrlConnection methods. 
2. Any java.awt images methods were replaced by the Images API methods of GoogleAppEngine.
Please note that this no longer returns a BufferedImage but an Image from the Images API. I think the user of this library will have to do some manipulation with the Image object as android doesn't read the Image object so what I did was I had to convert the Image object to a byte[] object when I sent it out from GAE and then convert it from a byte[] object to a bitmap using a Bitmap decoder found in android.