cerate webserver.py

lizherui给出的网页查看代码需要安装有lamp环境，过于苛刻。
这个文件是一个python的简易web服务器，可在装有python的机器上直接运行。运行程序之后在浏览器中通过地址
“http://127.0.0.1:9000/” 访问爬虫找到的网页链接。
网页内容参照lizherui给出的内容，基本没有改动。我的审美能力也比较菜，希望有人能美化一下生成的页面。
Merge pull request #2 from mmoonzhu/master

cerate webserver.py
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Update main.py

我修改了网页展示部分，使用bootstrap框架，让网页更好看。