Add ability to store and access module results later on in the play.  See examples/playbooks/register_logic for details.

passwd -> password
loginpass -> login_password
loginuser -> login_user
loginhost -> login_host

Add an example playbook that shows how to use the modules.

An example of the new syntax:

vars_prompt:
 - name: 'secret_variable_name"
   prompt: "Enter secret value: "
   private: "yes"
 - name: "nonsecret_variable_name"
   prompt: "Enter non-secret value: "
   private: "no"

Tweaking daisychain internals to allow get_url to modify the path destination when downloading to a directory.
Minor module refactoring.

	get module (with new module-magic-code!)
	Usage: ansible -m get -a "url=http://xxxxxxx  dest=fileordirctory"
	all cleanups as per @mpdehaan's suggestions
	add daisychain
	added example playbook (get_url.yml) with URLencode example

playbook structure checking.

Also be smart and don't run a play at all if no tasks in the play match any of the tags specified.  This includes not running the setup actions!

TODO: logrotate script and append to log instead.

Playbook will install ansible, create directory where git checkout goes,
and set up a cron job to run ansible-pull.

Revert "Revert "Actually wait for password prompt in remote sudo execution.  Totally breaks stderr debugging"

This reverts commit e1611403.

Conflicts:

	lib/ansible/connection.py