Build from source with nginx.ng

Build NGINX from source with nginx.ng state with support for passing
compile time flags necessary for installing modules such as more headers
by the openresty project.

Fix ppa install for Debian

On Ubuntu, you can take advantage of Personal Package Archives on Launchpad simply by specifying the user and archive name.  On other apt-based systems this must be the complete entry as it would be seen in the sources.list file.

Add lookup index for CentOS

Support installing the packages from the official repo on Debian

enabled

Added support to control gpgcheck and gpgkey via pillar

Fix the command that was killing nginx process.

Workaround for include being defined too early

This is crap but configuration for http scope cannot be both ordered and
merged from map.jinja it seems, see issue #40.

Adding default include for 'sites-enabled' dir

Resolve missing dependency for nginx home dir.

To resolve the occurrence of the below error, a dependency has been added to require the nginx user first be created, either by nginx package installation or explicitly with salt (when installing nginx from source).

```
----------
          ID: /var/www
    Function: file.directory
      Result: False
     Comment: User nginx is not available Group nginx is not available
     Started: 15:50:02.070799
    Duration: 0.531 ms
     Changes:
----------
```

add LSB header to logger sysv init script

subscribe to repo only if install_from_repo variable is set to true

Add support for Gentoo to nginx.ng

Add support for building from source with os_family=RedHat

Initial commit of SPM FORMULA

Fix for incorrect pkg repo base url on Amazon Linux on EC2

* added comment for pillar example
 * removed override releasever variable use for CentOS

* removed override releasever variable use for CentOS

Added nginx.ng.certificates state.