Make ignored/skipped different from changed

Fix gather_facts assumption that SETUP_CACHE for a host is empty

Abort a play at the start when no hosts matches, or no hosts are remaining

We now check explicitely for 'module_setup' in the SETUP_CACHE in order to avoid skipping setup because SETUP_CACHE was populated some other way. Other modules can implement the same mechanism to test if they've already run.

This closes #1206.

Since a skipped/ignored action is _very_ different from actual changes to a system, it always bothered me that  it was not easily distinguishable when skimming the output. This change makes ignore/skip a different color, and I chose cyan. Contemplated using dark-gray/blue, but prefered something that is readable with most terminal colors.

This change makes a distinction between no_hosts_matched and no_hosts_remaining.

In both cases we do not start facts-gathering, or run any tasks.

In the case that there are no more hosts remaining, we abort running tasks and abort the playbook.

I also cleaned up the leftovers from the previous patchsets, as these are no longer required.

This closes #1187.

Example playbook:

```yaml
---
- hosts: emptygroup
  tasks:
  - action: command date
  - action: command false

- hosts: all
  gather_facts: False
  tasks:
  - action: command ls
  - action: command false
  - action: command true

- hosts: all
  tasks:
  - action: command true
  - action: command false

- hosts: all
  tasks:
  - action: command pwd
```

Only gather facts once per node per playbook run

Unless gather_facts: True is on the play

Fix for issue #1194

Make use of UTC dates for RPM timestamp

So they can be shared/compared by people in different timezones

Feature: file info on templates accessible to Jinja2 templates

standardize DOCUMENTATION for nagios, pause

add ansible_managed

attempt at DOCUMENTATION for async_status

Teach fireball mode to disable the fireball by paying attention to 'minutes=N' (default 30) and do not let fireball module crash
on input.

Include a space and a colon after prompts, so you don't have to put them in yourself.  Consistent with documented behavior in examples/playbooks/prompts.yml

Allow non-string types in with_items variables

Add DOCUMENTATION to pause task

Add DOCUMENTATION to nagios module.

Be smarter about when to abort a playbook -- if it's early, we just didn't match any hosts, so keep on, hosts might be dynamic.

Remove debug print statement

Give each task its own module_vars

Otherwise each task will overwrite the previous' items, among
other things.

fireball DOCUMENTATION

- amended

Jumbo DOCUMENTATION patch

Use a regexp to filter out arguments instead

Added missing attribution to all module DOCUMENTATION strings

pipes.quote is a bit overzealous for what we want to do, quoting ;
and other characters that you most likely want to use in your shell
invocations. The regexp is the best I could come up with to be able
to only replace the parts of the arguments that shouldn't be
executed.