Create API endpoint that aggregates Darjeeling collections (bug 994304)
Merge pull request #1929 from diox/add-darjeeling-api

[WIP] Create API endpoint that aggregates Darjeeling collections (bug 994304)
Work around ES default limit of 10 when fetching apps from a collection (bug 994446)
Commit from Mozilla Verbatim by user matjaz@mozilla.com.: 4892 of 4925 strings translated (12 fuzzy).