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

Add support to install phusion passenger in the `ng`

Move includes to the top of nginx.conf

Fixed reference to pkg state when installing from official Debian repo

Fixed runlevel on nginx upstart file

Use oscodename instead of hard coded trusty for deb

Removed comment after testing that this change works with xenial

nginx/package: add onlyif requisite to nginx-old-init

add depenency to salt-contrib's basicauth

touch htpasswd file if it doesn't exist

Fixes #70