Since host variables are becoming important, it did not make sense to sustain --override-hosts, with the ability
to create hosts that didn't have inventory information, but also existed, in various groups.

ansible-playbook release-my-app.yml --extra-vars="version=123"

And make $version available in the playbook without re-editing the file

remove --extra-vars since the new YAML inventory stuff wasn't quite using it as designed and it is getting hard to follow
with that and SETUP_CACHE etc

Add support for specifying sudo passwords to both ansible & playbook.  Nopasswd sudo is no longer required.

Allow playbook to take --connection=local for easier reuse of playbook in kickstart w/o specifying connection: in
the playbook itself.  Both work.

interface.

add very small subclass of OptionParser to sort the options so mdehaan is happy

Added usage info to bin/ansible-playbook, now shows options on bare command line. NOTE: bin/ansible outputs usage to stdout, bin/ansible-playbook to stderr. Should they be consistent?

for other scripts to use.

d would be useful for --dry-run.

This prints remote module stderr on local stderr.

Conflicts:

	lib/ansible/playbook.py

Removed unneccessary shlex and replaced with basic split, some repurcussions in runner
that can be eliminated once we consistently pass args as a string (soon).

Applying callback model to runner, and using that in playbooks, so output can be more immediate in playbooks.

(Runner still does not use callbacks for default output)

playbooks -- Ratchet up logging prior to gating things with verbosity controls and upgrading output format

refactoring of playbooks now warranted, which we'll do before we move on.   This variable assignment
system makes nearly all possible magic possible, for we can use these variables however we like,
even as module names!

Various additions to make sure timed out and failed hosts are taken out of the playbook even if failed
during setup, async tasks, or poll operations.  This introduced some redundancy so I've made some
notes in the code where things need to be refactored to remove them.

Annotate more files, fix missing imports messing with playbooks.  Hey Tim, please test your stuff :)

Generic AnsibleError exception + host inventory missing exception.
First shot at catching these in a generic way in bin/ansible*.

but this is more or less a mirror of what /bin/ansible does.  It also has a 'fire and
forget' mode if the poll interval is left off or set to 0.

independent of output, and can also see all the output nicely grouped together if we want
to reformat it or make summaries of statistics.