windows平台下搭建scrapy环境，包括xml-3.6.0.win-amd64-py2.7.exe, chardet-2.3.0.tar.gz、pyOpenSSL-0.13.1.win-amd64-py2.7.exe、scrapy-1.0.zip、Twisted-15.0.0.win-amd64-py2.7.msi、xlrd-0.9.4.tar.gz、xlwt-1.0.0.tar.gz、zope.interface-3.8.0-py2.7-win-amd64.zip