fix defects
add video support
fix layout
Merge branch 'experimental-branch' into working-branch
fix make list
implement restricted topic / category

included creating new restricted
Merge branch 'working-branch'

Conflicts:
	app/assets/javascripts/xforum/forum_admin.js.coffee
	app/models/xforum/forum.rb
	app/views/xforum/admin_lists/_admin_users.html.erb