crawl news from website and convert it to .mobi for Kindle
Currenly, it crawl cnbeta.com
apt-get install python-pip
apt-get install python-dev
apt-get install libxml2-dev libxslt-dev
apt-get install python-lxml
pip install scrapy
pip install w3lib twisted lxml cssselect pyOpenSSL
ebook-convert
sudo apt-get install calibre