Redhat & Centos support

Created by: moonwolf-github

This version at leas works flawlessly - at least on CentOS7 "Minimal install". But it has numerous issues i was unable to resolve:

• "updating yum cache" means updating whole system (this is easy fixable i guess, but it may be better to leave it?)
• i had to install python2's pip despite python3 is in use
• many when directives
• separate django.yml file for centos (because of group is different)
• worst of all - i had to disable SELinux (because ngnix logs are in different place than default)

@nemesisdesign - what do you think? How can i improve this further?

References #5 (closed).