Compatibility with requests 1.1.
Fix up tests. All 80 tests now pass.
Merge branch '2.0' of github.com:datagovuk/ckanext-qa into 2.0

Conflicts:
	ckanext/qa/tasks.py
Reverts part of commit 198285. When you supply an invalid package or group name to this CLI, then the response to the CKAN API request will be 404, and this is what response.ok is checking. By removing that the 404 was being missed. I do not think it is worth catching the less likely RequestExceptions for more fundamental connectivity and incorrect server responses for a command-line tool.