add welcome title to sign in and register pages, improves their layouts, creates a panel below nav bar for display radio buttons and expandable new cheerup form
adds a cheerup crud panel to cheerup tile for admins only
fixes voting links depending on role and improves formatting of cheerup poster panel
adds a show link to cheerup tile and fixes the show cheerup page
Merge branch 'master' of github.com:stefanielim/Cheerups_Project_2
Merge branch 'master' into stef