Application paging

1. The Images page shows paged results (not the entire list) by default now.  There's a button at the bottom the user can press to get more results.  This is a pre-step to adding infinite scrolling.

2. Right now featured applications are added as they are found.  This will be changed when there's an endpoint we can get just the featured applications from.  Technically, the /api/v1/application endpoint returns ALL results if a ?page=1 isn't passed in.  So we could fetch this and use it to display the Featured applications as a bandaid in the interim.