Aggressive changes using selenium #buggy

Uses Selenium program to automate firefox, to allow retrieval of
complete DOM from cdc site.

Selenium documentation hard to find, although there is a lot of it.
Looking at tutorials and the .py scripts in the installation, we can see
the correct function names for python.

Currently I call using selenium object, but I really should be using a
webdriver object as here:
http://stackoverflow.com/questions/17975471/selenium-with-scrapy-for-dynamic-page

Also added .bat script for running cdc spider.