./group_vars/groupname.yml (for all groups the host is in)
./host_vars/hostname.yml (for the hostname given in the inventory)

This requires an actual inventory file, not script and the paths are relative
to the directory of the inventory file.

Plays and tasks now yell when they see parameters they do not understand, so that typos like 'var' for 'vars'
don't result in people having to ask questions about what is wrong with their playbook

you aren't going to need it.

Setup module no longer saves to disk, as templates are mostly useful in playbooks and this allows lots of simplifications
around file pathing and removes occasional permissions conflicts depending on how things are used.

in included files can still be templated just like top level playbooks.  Resolves
some issues about statements being evaluated before facts were available