Update lookups doc with shelvefile example

Add Python 3.5 to tox.ini and Travis

This reverts commit 49ca0eb7.

removed changes to make local action equate connection=local and brought it back to equate delegate_to=localhost

Fix an issue where cache plugins weren't updated in certain scenarios

fixes #12683

The first call to persisting facts would work due to the assignment of a
MutableMapping calling __setitem__ but subsequent module fact data would
not be propogated to the fact cache plugins because update() doesn't
invoke __setitem__.  This changes the behavior a little bit and ensures
set() is called on cache plugins.

Remove some warning of undefined name and fix classmethod syntax error.

Use AWS_DEFAULT_REGION env var if none specified

Fixes #12676

Fixes #12667

Also some pre-emptive python3 compat and a code simplification

fixes #12682

Fixes #12669

Fixes #12666

zabbix.py: Added additional ini file search path

update from origin

Update playbooks_blocks.rst

Remove heading that appears to be extraneous.

Indicate that credstash plugin is new in v2

Also offer a poor-man's alternative.