Add option to enable the sysctl -e option
Reworked PR to avoid repeating the command
Adding a wait loop to ec2_elb for the initial lb state when registering

Fixes #5305
Fix wrong module name for exception in nova compute

  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
setup: Fix KeyError: 'ipv4_secondaries' (issue #6274)
Fixed Links

Link to guru page was not rendering correctly on http://docs.ansible.com/faq.html.
Link to readme returned 404.
Merge pull request #6280 from JimShoe/patch-1

Fixed Links
Merge pull request #6275 from mscherer/fix_nova_compute_exception

Fix wrong module name for exception in nova compute
Merge pull request #6279 from techtonik/patch-1

setup: Fix KeyError: 'ipv4_secondaries' (issue #6274)
Remove trailing whitespace.
Fix broken Ansible Tower link.
Update intro_installation.rst

error in ubuntu install instructions
Merge pull request #6281 from alimony/fix_broken_tower_link

Fix broken Ansible Tower link.
Merge pull request #6282 from koffu/patch-1

Update intro_installation.rst
Fix inventory for test_dir_inventory

It came up that fixing this unit test may relate to another ticket that is open. This work allows us to uncomment this unit test by fixing how we pars variables allowing a quoted variable to contain a '#'.

Work also went into cleaning up some of the test data to clarify what was working.

Lastly work went into cleaning up formatting so that the code is easily read.
Add credential parameters to the GCE modules.

In order to simplify the workflow with the GCE modules, it's now
possible to add the parameters and project name as arguments to the
various GCE modules.

The inventory plugin also returns the IP of the host in
`ansible_ssh_host` so that you don't have to specify IPs into the
inventory file.

Some update to the documentation are also added.

Closes #5583.
Merge pull request #6265 from franckcuny/gce-fixes

Add credential parameters to the GCE modules.
fixes #6244
Merge pull request #6290 from lberruti/fix_complex_args

fixes #6244
Update playbooks_vault.rst

very minor grammatical fix for readability