Update intro_configuration.rst

Update README.md

Doc fix in intro_installation.rst

Add some helpful detection if core modules are not found for those running on the development branch.

Output a useful message if `git submodule update --init --recursive` not
yet performed

```
$ ansible --version
ansible 1.8 (submodule_ansible_version 59ae596484) last updated 2014/09/28 13:20:51 (GMT +1000)
  lib/ansible/modules/core: (detached HEAD 617a52b20d) last updated 2014/09/28 13:15:25 (GMT +1000)
  lib/ansible/modules/extras:  not found - use git submodule update --init lib/ansible/modules/extras
```

`ansible --version` etc. now include information about submodules

```
ansible 1.8 (submodule_ansible_version ffee9a8f) last updated 2014/09/28 11:03:14 (GMT +1000)
  lib/ansible/modules/core: (ec2_snapshot_remove 3a77c31ecb) last updated 2014/09/27 18:23:31 (GMT +1000)
  lib/ansible/modules/extras: (detached HEAD 110250d344) last updated 2014/09/27 14:33:42 (GMT +1000)
```

Also improved handling of detached HEAD when printing out version
information.

Updated installation instructions for submodules

Missing code block

Added `--init --recursive` to installation instructions
as per @bcoca's suggestion on ansible-project mailing list

Due to the long-standing bug in sshpass, which can crash OSX.

Fixes #5007

Also updated the CHANGELOG for the feature

Merge branch 'admiller/async_resume' of https://github.com/maxamillion/ansible into maxamillion-admiller/async_resume

Fixes #9132

Fixes #9140

Fixes #8947

Also moves the calculation of the destination file name until after
the slurp of the file contents, since the source as returned by slurp
may now be different, so we want to use that expanded path locally.

Fixes #8942

Allow fairly common ssh repo clone path to work

Fixes #8552

Remove unreachable code