Create website_check.py

1.访问 new.bbc.co.uk ,获得html源码
2. 或者a 标记的字段如下：
<a class="story" href="http://www.bbc.co.uk/news/world-asia-china-23063829">US businessman Chip Starnes is freed after being detained in his factory in China for nearly a week by workers over a pay dispute</a>
3.访问上面的href 连接，根据返回码判断是否正常。
4.结束
# python website_check.py -w 5 -c 10
OK: Top story 'UK set to become first country to allow the creation of babies using DNA from three people, after government backing' retrieved in 4.672903 seconds