When playbooks fail, attempt to create an inventory file in the inventory directory that allows rerunning
of the playbook against only the hosts that failed.

Upgraded variable support met with upgraded conditional support, see examples/playbooks/upgraded_vars.yml
for details!

Able to use "environment: " on any task to pass proxy details and other useful settings.  Can be a variable
or a dictionary.

Default to -H to set $HOME appropriately.

Reorganizing changelog, some cleanup still needed, but now it's easier to tell what is in the release :)