add some debugging packages

Conflicts:
	requirements.pip
configure git to ignore the virtualenv directory
add main file for the crawler
add beautifulsoup dependency
add logic to extract product urls from sitemap
add requests package as a dependency
change crawler to extract product data
change the crawler to save the product data to a csv file
change crawler to solution_two
include the challenge description into the readme
adjust the gitignore file
add documentation to the solution two source file