Now uses setting in Config to determine how to scrape sponsors.

Philadelphia, Chicago, and other cities have different ways in which they
format sponsors for things in city council. Now you can specify whether
or not the sponsors are listed as links or a list of sponsors separated
by commas.

To scrape legistar instances where sponsors are a list of links
set sponsor_links = True in the Config for the scraper.

If the list is a list separated by commas, set sponsor_links = False.
Added a sponsor_links default setting

This default setting assumes that sponsors will be a list of links.
Should preserve existing functionality for the Chicago legistar scraper
while allowing extended functionality.
Added test for getting Philly sponsors and also adapted existing tests to use DEFAULT_CONFIG

Two changes for this commit -
- Added test coverage for grabbing philadelphia sponsors
- Converted existing tests to use Config and DEFAULT_CONFIG - otherwise
all tests fail since they do not set sponsor_links
Some debugging output
Removed debugging output - shouldn't have committed that.
Add index scraping for legislation that has indexes
Revert "Add index scraping for legislation that has indexes"

This reverts commit 5282ab02bf0b3b91ea5f6c515e8c2f09553e18df.
Merge pull request #11 from notthatbreezy/master

Added config setting for grabbing sponsors