Add support for extracting URLs from img srcset attribute

Description

Encountered at: http://www.morganstanley.com/what-we-do/wealth-management
srcset contains a list of images which are chosen by the browser depending on the screen size.

Environment

None

Status

Assignee

Unassigned

Reporter

Adam Miller

Labels

None

Group Assignee

None

ZendeskID

None

Estimated Difficulty

None

Actual Difficulty

None

Priority

Major
Configure