Add loading and error handling to price tier xhr (bug 885258)
add in fireplace endpoint that is almost identical to apps, once client is updated we can move stuff over (bug 875547)
remove prints
fix themes on discovery pane (bug 885606)
remove header that was removed by @cvan
re-fix themes on discovery pane (bug 885606)
Merge pull request #826 from muffinresearch/add-progress-on-tier-changes

Add loading and error handling to price tier xhr (bug 885258)
Add downloads count and creation date to the app API results (bug 867839)
Add is_privileged property on Version, use it in reviewer tools (bug 846420)