attempting to fix Http404 has_header calls (bug 951355)
Fixed REGION.id to be region_id
Bumped z.addons to DEBUG for a few days.
Commit from Mozilla Verbatim by user steekid.: 5028 of 5028 strings translated (0 fuzzy).
Merge pull request #1630 from vinyll/http404_header-951355

attempting to fix Http404 has_header calls (bug 951355)
Fix upsell in AppSerializer and es_app_to_dict (bug 956820)

- Don't return upsell if in an excluded region
- Don't return upsell if it's not a public app
- Add tests
Tweak Addon / Webapp transformers to improve performance (bug 956987)

- Don't load categories, listed_authors in Webapp
- Don't load translations for previews in Webapp
- Don't call version transformer twice
- Do set _premium = None on addons that have no AddonPremium
- Remove fallback to authors for developer_name in Version (all
  manifests should have developer name set nowadays)
Merge pull request #1593 from diox/apps-and-collection-api-performance

Tweak Addon / Webapp transformers to improve performance (bug 956987)
reload() is unreliable, it only resets stuff from _meta.fields
Fixes following _premium caching introduced in 092da060bb
Use make_premium() instead of manually assigning a premium/price
have ?vary=0 actually remove Vary headers
Merge pull request #1625 from diox/app-upsell-non-public

Fix upsell in AppSerializer and es_app_to_dict (bug 956820)
add tests for communication dashboard emails