add class declaration for Application and ApplicationListEntry
add models for application list
add comments to ApplicationList models
migrate ApplicationList to database
add ApplicationList to admin interface
add html file for ApplicationLIsts
add html file for single ApplicationList
add urls and views for app lists
add app lists url to top of nav bar
update placeholder image in app lists page
update placeholder image on app list page
add image field to ApplicationList model
display ApplicationList images in templates
add migration for application list images and add an image