home page for user to pick an app to log in to.  redirects to auth URL for the app
Also - replaces $ -> with $ document .on 'page:load', ->  since turbo links implements client side dom caching for increased page performance, $-> no longer works when navigating - but only on refresh
Merge branch 'master' of https://github.com/safe-net/snaplogin

Conflicts:
	app/controllers/root_controller.rb
	app/views/root/index.html.slim
	config/routes.rb
replaces index.html.slim with index.slim (.html is redundant)
root_controller index now is a welcome and choose your app page., login is the old index
added routes to suit