[1541] Add empty alt tag to gravatar
[#1539] Create a minimal new Trash page
[#1664] package_create+update: fix config permission check

Use the same permission checks for both package_update and package_create
and check all the applicable config options: anon_create_dataset,
create_unowned_dataset and create_dataset_if_not_in_organization
[#1668] Show only active users on cli
[#1745] remove lie about python 3 string formatting
[#1745] nothing wrong with from module import name
[#1745] recommend from module import name
[#1745] add importing diagram to imports section of coding guidelines
Merge remote-tracking branch 'origin/master' into fix-package-permissions
[#1665] Add new_tests.helpers.change_config() decorator

This allows you to temporarily change a CKAN's config value during a test.
It'll restore the values to what they were before, after you test is ran.

Conflicts:
	ckan/new_tests/helpers.py
[#1664] clear auth functions cache when changing config
[#1664] tests for anon users
[#1664] tests for logged in users
[#1664] fix tests
[#1539] Fix typo
Merge branch '1539-clean-trash'
Merge branch '1541-gravatar-alt-tag'
Merge branch '1745-python-coding-standards' of https://github.com/wardi/ckan into wardi-1745-python-coding-standards
Merge branch 'wardi-1745-python-coding-standards'
Merge branch '1668-deleted-users'