add load() method for handle download progress percent

[youxiachai]

I think it useful when sometimes show downloading persent;
Example:
private Handler handler = new Handler(){

    @Override
    public void handleMessage(Message msg) {
        super.handleMessage(msg);
        tv.setText("" + msg.obj);
    }

};

aq.id(R.id.button1).clicked(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            String imageurl = "http://jpp2.imghb.com/pic/pic/52/60/24/1396053752602447_a602x602.jpg";

            aq.id(R.id.imageView1).load(new LoadListener() {

                @Override
                public void onLoadProgress(int current, float max) {
                    float present = (float) (max - current)/ max;
                    Log.d("api", "present"+ String.format("%.2f", (present * 100)));
                    Message msg = new Message();
                    msg.obj =  String.format("%.2f%%", (present * 100));
                    handler.sendMessage(msg);
                \
                }
            }).image(imageurl, false, false);

        }
    });

[Malachiasz]

you could give more meaningful topic name