added methods for retrieving vapp and vm

Merge branch 'serial_should_be_string' of https://github.com/klshxsh/ansible into klshxsh-serial_should_be_string

Note that this allows both integers (e.g. 3) and percentages (e.g. "30%")
Also changed default back to 0 rather than '0'

Adding the inventory_file var back

Update docs (playbooks_loops.rst, playbooks_filters.rst)

Installation update for people using Fishshell

Update synchronize module plugin to work on OS X

Update lookups doc with shelvefile example

The serial keyword can be specified as a percentage, e.g '30%' or a number e.g. '3'; therefore it needs to be a string to allow both types

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