Stderr logging

Make copy module idempotent.

Check md5sum before overwriting a file. Unconditionally copying changes the timestamp.

Correct default user and port in playbook.

d would be useful for --dry-run.

This prints remote module stderr on local stderr.

This prints the stderr of the executed modules on local stderr.
Most methods on Runner now return a fourth "err" parameter.

They are set in the constructor.

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).

(edited author's original commit comment -- MPD)

support for quotes strings in command module (via posix=False), related fixes to keep other things from breaking

Fix except statement in template module.

Python 2.4 (RHEL 5) does not know 'as'.

Sudo support operational in both playbooks and main program.   Implementation could use some cleanup.

Fix exception catching for py2.4

message text per skvidal's suggestion

Supplementary group membership now in users module

Remove support for membership from group module

Remote port and error check for old paramiko

Remove the group membership example.  There's not much to twiddle with
the group module.  Give examples for what is possible.

Use the user module to define group membership.

This adds two options to the user module: groups and append.  groups is
a comma-delimited list of supplementary groups a user should belong to.
If a user is currently a member of a group not listed in groups, the
user will be removed from it.  To change this behavior, use append=yes.
This will append the user to the list of supplementary groups and *not*
remove the user from unlisted groups.