Asks for a URL instead of putting the link parsing code in the main method.
Created baseline class for downloading a single article.
Added sample code for a single-threaded article downloader.
Ready to extend to multi-threaded (process) now.
Implemented a working multi-process downloader.
Merge remote-tracking branch 'origin/master' into multithreading

Conflicts:
	poc.py
	writers.py
Switched back to spaces.
Integrated multithreading with new Runners model.
Merge pull request #10 from gt-big-data/multithreading

Multithreading