In order to simplify the workflow with the GCE modules, it's now
possible to add the parameters and project name as arguments to the
various GCE modules.

The inventory plugin also returns the IP of the host in
`ansible_ssh_host` so that you don't have to specify IPs into the
inventory file.

Some update to the documentation are also added.

Closes #5583.

Fixes templating of ansible_ssh_host for delegates.

Tested that this works. Confirmed.

Fix incorrect use of copy() on list, causing a traceback

Avoid range selection on empty groups

Update CONTRIBUTING.md

docsite no longer has a subdirectory latest.

minor typo in playbooks_variables.rst

This prevents a traceback when the group is empty.
Fixes #6258

Another minor typo.

so so, this should probably be fixed!

Merge pull request #6256 from angstwad/changes_changes-yo-dawg-i-herd-you-like-changes-so-commited-some-changes-into-changes-so-you-can-diff-while-you-diff

Add note about su support in CHANGELOG

CHANGELOG.md: remove duplicate entry about docker

docker_image: added support for docker_py >= 0.3.0, Docker API >= 1.8. Replace #6178

This reverts commit b769b418, reversing
changes made to 1e01fb85.

Fix regression causing setup to run for every play

This patch makes sure setup only runs once, unless it is enforced on a play.

Adds modules for managing Amazon RDS parameter and subnet groups.

get rid of newline chars when reading password file

typo fix

added better gentoo/funtoo support

missing import in assert module

Fixed missing ansible.errors import in assert module

Update CHANGELOG.md