* Initialize INSIGHTS_CLOUDFRONT to null
* Put cloudfront domain under INSIGHTS_CONFIG
* Use INSIGHTS_CLOUDFRONT_DOMAIN in insights config
* Define INSIGHTS_CLOUDFRONT_DOMAIN null by default
* Set CORS_ORIGIN_WHITELIST to INSIGHTS_DOMAIN
* Add CORS header to Insights static files
* Split CORS whitelist into default and extra
* Allow HEAD, GET, OPTIONS in Insights static
* Try setting CORS Origin to $http_origin
* Use if cond to enable/disable CORS instead of map
* Missing space
* Don't initialize $cors
* Back to the old $cors_origin map
* Don't send CORS whitelist to django settings
* Replace tab with spaces
* Remove allow_all var, and update changelog
* Rename CLOUDFRONT to CDN in var name
