[nginx/users] convert file.present into file.managed with no content

[nginx/users] add makedirs to htpasswd deploy

Touch htpassw for nginx

[README] include nginx.ng.certifcates

Allow to specify a different passenger config file in nginx.ng

Fix for PR #172

Add default value when calling pillar.get on nginx:ng:dhparam

default value if dhparam isn't defined in the pillar.

Allow debug symbols to be included when compiling from source

Add dhparam creation

Add support for FreeBSD

New Feature/Improvement - Added deleted option to be able to remove site files

update README, closes #121

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

New feature - Enable the uploading of the config files

Updated pillar.example file with distro learnings

Fix for OpenSuse leap, salt 2016.3.4-84.13

In order to improve security and ease of use, added creation/generation
of dhparam file.

Make certificates path configurable.

Fix missing defaults when no `install_from_*` is set