Create backend API for admin page.
Add cache and provider counts.
Move patient count to admin admin module since it is a function used exclusively by the admin panel.
Add tests for new admin routes.
use Thorax to clean up API usage
add infinite scrolling
update HDS to add HQMF ID to categories

After making hqmf_id the ID, we need hqmf_id to be present when bootstrapping the data on initial page load.
support compound primary keys for measure model
Merge pull request #242 from pophealth/admin_view

Add infinite scrolling to admin measures view
poll query view if it's not populated

execute the polling on the button view, so that it's executed for both regular measures and stratified measures
Merge pull request #244 from pophealth/adminPageAPI

Create backend API for admin page.
Merge pull request #250 from pophealth/update_query

poll query view if it's not populated
Merge branch 'master' of https://github.com/pophealth/popHealth into aggregate_percentage