Merge pull request #6 from johnb30/master

Adding more URLs
Merge pull request #7 from johnb30/master

Fixing things. Making things work better.
Merge pull request #8 from johnb30/master

Update user agent
Update whitelist_urls.csv

Added Haaretz.
Elaborated MongoDB explanation
Fixed typos in Mongo section
Merge pull request #9 from ahalterman/master

Elaborated MongoDB section
Improved full text extraction
removed Haaretz
Merge pull request #10 from ahalterman/master

Customized scraping for some sources
Putting everything in line