Improve Linux network facts incl. bridges, ppp, wwan devices

This patch adds all interfaces (even inactive ones) to setup output.
postgresql_db: add args lc_collate, lc_ctype

Allow the specification of additional locale settings (lc_collate and lc_ctype) when creating a new database (state=present).

Fail if the specified database already exists with different locale/encoding settings. (These settings can't be changed for existing databases as far as I know, and failing seems better than suggesting that no change was necessary by returning changed=False)
Extend authorized_keys module for use with alternate AuthorizedKeysFile configurations
now ssh connection plugin will only pass user as an option to ssh if it is
differnt from the current user. This should enable overrides for user in
.ssh/config w/o breaking any current functionality.

Signed-off-by: Brian Coca <briancoca+dev@gmail.com>
terminate immediately on a failure
compare the number of available hosts before and after running each task
Initial commit of rax library

This library provides functionality for the Rackspace Public Cloud by
way of the official pyrax SDK (https://github.com/rackspace/pyrax). At
this time only the cloudservers service is functional. Instances can be
created or deleted. Idempotency is provided on matching instances with
the same name, flavor, image, and metadata values within a given
region.

pyrax usage does require a credentials file written out to hold username
and API key.  See pyrax documentation for details
(https://github.com/rackspace/pyrax/blob/master/docs/pyrax_doc.md)
Initial commit of rax inventory plugin

The rax inventory plugin provides a way to discovery inventory in the
Rackspace Public Cloud by way of pyrax, the official SDK. Grouping will
be done if a group:name is found in the instance metadata. When a single
host is queried all the instance details are returned with a rax_
prefix.

Because inventory plugins cannot take extra arguments, ENV variables
must be set to point to the pyrax compatible credentials file and the
region to query against.
Fix up docs and add ability to insert files

Files can be inserted during server creation (like a fully formed
authorized_keys file). This code allows that to happen.

Docs were updated for formatting, location, and to add the new entry for
files.
Adding npm module
postgresql_user: fix docstrings

Change documentation of "state" param to refer to user (role) state instead of
database state.

Change 2 function docstrings to reflect the code
Merge pull request #2543 from b6d/postgresql_user-docfix

postgresql_user: fix docstrings
Typo in documentation.
Merge pull request #2547 from jsmartin/cloudformation

Typo in cloudformation module documentation.
adds private_ip param to ec2 module
Updated and improved the documentation (examples)
Added functionality for md5 checksum together with a new overwrite param
to indicate that remote file should be overwritten if a file with the
same filename exists.
Update release version.
Preliminary ability to use Jinja2 {{ }} to replace ${foo.bar} in playbooks.  Can't use both at the same time per line.
Update README.md