make policy only be required if state is not disabled

Update Hadoop contrib URL.

when a pkg is installed, but not from any repo, don't error out

that it is not installed.

Also when a pkg is both installed and in a repo do not look it up
more than once

References issue #1380.

Raise error for missing hosts in inventory scripts as well

None is unfortunately not an integer

Copy module can replace symlink with a real file.

Add support for Github-flavored Markdown to module_formatter

module_formatter: .rst now correctly handles code examples

Addition to WhoUses + typo fix

symlink fix

docsite: small typo in handlers example yaml

Fixes for ansible_ssh_host and ansible_ssh_port

 - fixed template (it was the template), adding indentation with Jinja2
 - added description of code examples to man-page template (was missing)
 - fixed fireball, cron, and debug module examples to confrom

- Uses HTML tables and Github-flavored code blocks (3 backticks)

Test for when environment variable and configuration file
variable both set now tests that the environment variable takes
precedence

Removed logic that would never be triggered from
lib/ansible/constants.py

Fix indent of fail module example to prevent unwanted `<blockquote></pre></p> <br/></blockquote>` from showing up in docsite output.