Allow top level playbook files to import other playbook files, added some basic
playbook structure checking.
Soft import of paramiko since we have the SSH and local connection types now.  Packaging will still
require it.
Make adding tags to a playbook work as shorthand to tagging all tasks in the play.
Bring the cobbler external inventory script up to date with current usage (--list, --host hostname)
changelog update
The MySQL modules
Merge pull request #590 from marktheunissen/mysql

The MySQL modules
Squashed commit of the following:

commit 4430ce3eefcdff0b0ceffea0ef66ea8e876a807d
Merge: 631783b 649963c
Author: Michael DeHaan <michael.dehaan@gmail.com>
Date:   Thu Jul 12 01:28:43 2012 -0400

    Merge branch 'host-groups' of https://github.com/dagwieers/ansible into daggroups

commit 649963ca2c2610b97a90d2449132a57ae6b39ec9
Author: Dag Wieërs <dag@wieers.com>
Date:   Thu Jul 12 23:01:00 2012 +0200

    Added comments in the example yaml file as requested

commit 7f9718f185ec991bc165c4a52b2468cf41f4c349
Author: Dag Wieërs <dag@wieers.com>
Date:   Thu Jul 12 22:49:38 2012 +0200

    Add the default nose color too, to test specific overrides

commit eb63b9e899318ce0c26902ca73af50135a6224e4
Author: Dag Wieërs <dag@wieers.com>
Date:   Thu Jul 12 22:44:35 2012 +0200

    Introduce comics and cartoons to test yaml groups defined on a per-node basis

commit aa13d233078b825a8057bebf35ed478342cf4e43
Author: Dag Wieërs <dag@wieers.com>
Date:   Thu Jul 12 19:33:15 2012 +0200

    A small fix to revert to old state

commit 264ebaa77c4243f2e9117e8d1168dc2f2eed7ee2
Author: Dag Wieërs <dag@wieers.com>
Date:   Thu Jul 12 19:31:51 2012 +0200

    Combine both yaml unit tests into one example file

commit 7db49a8048e78402c4c9a0a6cb2604689280fbbb
Author: Dag Wieërs <dag@wieers.com>
Date:   Thu Jul 12 16:46:53 2012 +0200

    Might as well fix this too

commit f36c6c8c5b419865939c7e2b0b26f6c97255fdc8
Author: Dag Wieërs <dag@wieers.com>
Date:   Thu Jul 12 16:42:00 2012 +0200

    Added unit tests for host-groups patch

    For the unit test I chose to keep the original yaml file in place as a reference.

    This patch also includes a fix.

commit a96f6813522c5ae8b2be4514a2de56a775c6b7b0
Author: Dag Wieërs <dag@wieers.com>
Date:   Thu Jul 12 12:30:43 2012 +0200

    Allow groups to be defined on a per-host basis

    This makes it possible to define on a per-host basis what groups a host is in.
    When managing a large set of systems it makes it easier to ensure each of the
    systems is defined in a set of groups (e.g. production/qa/development,
    linux/solaris/aix) rather than having to add systems to multiple disconnected
    groups.

    ----
      - host: system01

      - host: system02

      - host: system03

      - group: linux
        hosts:
        - system01
        - system02

      - group: solaris
        hosts:
        - system03

      - group: production
        hosts:
        - system01
        - system03

      - group: qa
        - system02

      - group: dbserver
        hosts:
        - system01

      - group: ntpserver
        hosts:
        - system02

      - group: webserver
        - system03
    ----

    Can be redefined as:

    ----
      - host: system01
        groups: [ linux, production, dbserver ]

      - host: system02
        groups: [ linux, qa, ntpserver ]

      - host: system03
        groups: [ solaris, production, webserver ]
    ----
Changelog update
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.
Much streamlining around setup steps in playbooks, now only run setup once per play.
Warn if something loaded by vars_files is not a dictionary
Make the logic behind vars_files smarter, so host specific vars go into the setup cache, but other variables
are usable top level.  This allows vars_files data to be used, most of the time, just fine in with_items,
(error handling pending) but is mostly a memory and efficiency thing.
Error handling and magic around with_items, to let you know when variables are usable inside it and when not.
changelog update
Change the way we do with_items to make them happen next to each other in runner, which eliminates the problem of with_items and vars_files sometimes not playing  nice with each other.

(Also a fix for the user module error handling when the user
is not present at the time of the return.  This can only really be caused by multiple ansible executions).
Update changelog
Allow gather_facts: False in a playbook as a way of disabling the fact step if you know
you aren't going to need it.
Clean up imports in utils, add nicer recursion depth limit check.
Misc cleanup -- moved function out of utils, removed debug statement.