Remove the -D module debug flag, which no longer is functional due to sudo pty requirements, and replace with -v/--verbose.

This flag will show playbook output from non-failing commands.  -v is also added to /usr/bin/ansible, but not  yet used.

I also gutted some internals code dealing with 'invocations' which allowed the callback to know what module invoked
it.  This is not something 0.5 does or needed, so callbacks have been simplified.

Runner() usage to the new inventory model.

This introduces the Inventory class.

Playbook uses the internals of Runner to limit the number of hosts to poll
asynchronously. To accomodate this, Inventory can be restricted to specific
hosts.

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

interface.

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

for other scripts to use.

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)

Import cleanup, plus have /bin/ansible remind you if no hosts were matched by a pattern (for instance, assume
there was a typo in the pattern)

Remove "import *" from bin/ansible so we can use pyflakes, and remove unneeded imports in the process

If the inventory file is EXECUTABLE, treat it as a file returning JSON, if called directly, return the host
and groups list.  If called with an argument of a host name, return the key=value data for that particular
host.

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