学了一天golang，一边看文档一边写的go读取分析json并下载图片
json api为爱壁纸HD mac 1920×1200版本，高清妹子图
总结：go+json=shit
package main
import (
"fmt"
"io"
"io/ioutil"
"net/http"
"os"
"path/filepath"
"strconv"
//"encoding/json"
"strings"
"github.com/bitly/go-simplejson"
)
const (
DataRoot = "./tmp/" // 存放封面图
