* updated 'list_approved.html' and related 'ListApprovedView'
* small update to 'profile.html'
* implemented function to auto login user after activation
  o added 'login_on_activation' and connected to 'user_activated' signal
  o updated 'activation_complete.html' template
* added poster to 'introduction' page: skaschool-poster.jpg
* removed 'about' link in 'navbar.html'
* small updates to 'index.html', 'program.html'