api call changes depending on whether the tree is for target or compound
class. Templates different  for each. Uses ops.js with compound class
pharma calls
use correct api call, it is compound pharma class not compound class
fetch correct next page of results. Set the page to 1 on initial page
load
fetch more tree pharma using filters and sort
filter includes the header sort
compound class tsv download on server side, needs additional param in
app_settings.yml