Support YAML list of hosts in playbook.

Reading the docs, I was a bit confused as to how to specify multiple hosts/groups in a playbook.  Being YAML, I assumed a normal YAML list would work:

    ---
    - hosts: [host1, host2]

But this crashes when inventory._matches() assumes hosts is a string.  This patch just checks if hosts is a list, and turns it into a string joined by ';'.

runner._chain_file_module() calls .get() on error string

runner._return_from_module() normally returns a list (?) of `[str,bool,dict,str]`, but on error it returns `[str,bool,str,str]`.  runner._chain_file_module() then tries to call .get() on the third item (`data2`), which fails when it's a string.  This patch only accesses `data2` if the return value was `ok`.  It might be better to return consistent types in both cases, but I'm not sure where/how else the return value is used.

handle issues when the hostlist is inadvertently set executable

* 'devel' of git://github.com/ansible/ansible: (2 commits)
  Fix tests for facter and the ansible_facts API.
  ...

Ohai and facter modules should not use the ansible_facts API.

and/or executing it fails. This produces a nicer error message than
a traceback

Expand user in ssh identity file

Fix incorrect merge of custom-facts branch.

This fixes #216.

bugfix for ssh_config patch

Conflicts:
	lib/ansible/runner.py

changelogs yet since this isn't released yet (but 0.3 is)

Conflicts:
	lib/ansible/playbook.py
	lib/ansible/runner.py
	library/apt

Debmake

The basic idea is sudo /bin/sh -c 'quoted_command'.  We use Paramiko's low-level API to set a timeout, get a pseudo tty, execute sudo and the (shell quoted) command atomically, wait just until sudo is ready to accept the password before sending it down the pipe, and then return the command's stdout and stderr.

This should be faster, as there are no unneeded sleeps.  There are no permissions issues reading the output.  It will raise socket.timeout if the command takes too long.  However, this is a per-read timeout, not a total execution timeout, so as long as the command is writing output and you are reading it, it will not time out.

Local and non-sudo commands remain unchanged, but should probably adopt a similar approach.

Since this is a significant change, it needs a lot of testing.  Also, someone smarter than I should double-check the quoting and execution, since it is a security issue.

If the module result contains "ansible_facts", that will be added to the setup
cache.

Implemented optional "default-release" argument for apt module

The value is passed to apt-get's "-t" option. Useful for installing backports, e.g.:

  ansible webservers -m apt -a "pkg=nginx state=latest default-release=squeeze-backports"

Add missing deps in setup.py