... by providing a pillar string. I developed this for use in
combination with ext_pillar and file_tree to deploy letsencrypt
certificates.

tabs cause salt to trigger a render error because tabs are 'illegal':
```
yaml.scanner.ScannerError: while scanning for the next token
found character '\t' that cannot start any token
  in "<unicode string>", line 33, column 32:
            pid: /var/run/nginx.pid\t\t### Directory location must exist
                                   ^
```

Improvement - Disable reload of nginx when enabled=False (previously the nginx was always reloaded if settings.config != None; even with enabled=False)

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.

* removed override releasever variable use for CentOS

the debian package installs the nginx service just fine, but the extra
fifo->syslog functionality would be nice to have under debian as well.

Fixes #39.

Fixes GH saltstack-formulas/nginx-formula#14.

* Fixing iteration for building nginx by source with respect
  to modules
* Adding `CHANGELOG.rst` and `VERSION` per https://groups.google.com/forum/#!topic/salt-users/zHguqsk-mds