* Adds another module utility file which generalizes the
  access of urls via the urllib* libraries.
* Adds a new spec generator for common arguments.
* Makes the user-agent string configurable.

Fixes #6211

Fixes #6331

tags lists are properly uniqued and joined now, also avoids type issues when passed as list/set or strings

Signed-off-by: Brian Coca <briancoca+ansible@gmail.com>

Fixes #6047

  failed: [127.0.0.1] => {"failed": true, "parsed": false}
  invalid output was: Traceback (most recent call last):
    File "/tmp/ansible-tmp-1393950384.39-102240090845592/nova_compute", line 1328, in <module>
      main()
    File "/tmp/ansible-tmp-1393950384.39-102240090845592/nova_compute", line 241, in main
      except exc.Unauthorized, e:
  NameError: global name 'exc' is not defined

This prevents a traceback when the group is empty.
Fixes #6258

Fixes #5305

Fixed missing ansible.errors import in assert module

Add option to enable the sysctl -e option

Show more whitespace throughout playbook examples to encourage better standards in first playbooks folks write.

the primary name of the parameter in the examples.

Trim references to fireball as we want folks using accelerate or pipelining options.  Fireball is pretty well deprecated at this point, but will still be part of the release.