Gelencsér Szabolcs / circlestack

Easy setup

See merge request !397

commands: init command extended with default node, users, groups, permissions and detects kvm hardware acceleration presence.

* adds default node
* adds test groups: 'Administrators', 'Powerusers', 'Users'
* adds test users: 'admin', 'poweruser', 'user'
* adds KVM present notification for Administrator
* shares 'vm' network with groups

settings: move static file and pipeline configuration to the 'static_and_pipeline' module, move get_env_variable() to the 'util' module

network, dashboard: add privileged and non-privileged user support to Vxlan views, and add access management

dashboard, vm: rework Interface forms, views and operations, add UserInterface forms, views and operations; extends Interface models and views with Vxlan support

Upgrade Django 1.11 fix

See merge request !396