add rails_admin/device
add cancan
welcome controller
original layout
schema.rb
 add rails admin and cancan
add user admin seed
fix readme
rename apllication controller
ignore .idea
Merge branch 'feature/add_rails_admin' into develop
Merge branch 'feature/main_page_3' into develop

Conflicts:
	Gemfile
	Gemfile.lock
	app/assets/stylesheets/application.css
	app/views/layouts/application.html.haml
	config/routes.rb
	db/schema.rb
welcome page
header fix
Adding tours
State machine
Adding competitions
Migrations and factories
Task_6_competitions
Adding new files