Added prev_state for directory
Move more responsibility to common EC2 module

Moved `AWS_REGIONS` into `ec2` module
Created `ec2_connect` method in `ec2` module
Updated modules able to use `ec2_connect` and `AWS_REGIONS`
Don't override sudo if transport is set to local.
https://github.com/ansible/ansible/pull/5251
Fixes #5238 Improve error messaging about unquoted variable references in playbooks
Modified docsite layout to use Google custom search.
Merge pull request #5517 from lichesser/fix_set_depreciation_warning

Fixes #5513. set is built-in since 2.4 and deprecated since 2.6
Merge pull request #5520 from kormoc/fix_symetric_tyop

While looking into filters, I noticed that the documentation has a typo....
Merge pull request #5528 from dverhelst/devel

Adding support for detecting RHEV Hypervisor in ansible_virtualization_type
Merge pull request #5404 from sivel/rax-improvements

rax module: improvements
Fixes #5353 create etc/hostname file in debian if it does not exist
Fixes #5369 Do not pass --force-yes to aptitude
BugFix: synchronize override sudo settings.
Revert "BugFix: synchronize override sudo settings."

This reverts commit d3ee15205d357f3ea5db30de17a8eb8309790ea0.