* Remove produces annotation + minor improvements (#1232)
* Fix overlap logic.
Allow event cohort periods that start within the target cohort era.  Prior version required the event cohort era to start and end in the target cohort era.
When collapsing, ensure start-end dates span at least a day.
Use count_big when counting cohort events and pathways.
Pad end dates to make non-inclusive.
Added casts for impala
Added temp-table cleanup.
Fixes #779.

* Omit cohort expression from list. - Fixes #219.
* Added client cache directives to response header (#1231)
* Removed legacy service which exposed server side request forgery issue (#1241)
* Added handlers for unexpected errors (#1237)
* Restored Kerberos auth support (#1253)
* Fixes masquerading of credentials in PLE / PLP results (#1255)
* Better quotes handling
* exclude older sql render versions (#1259)
* Fix compatability of /cohortdefinition/{id} endpoint (#1262)
* fixes cycling dependencies (#1264)
* Fix grouping problem in bq (#1267) (#1269)
* Fixes failed Cohort Pathways on Impala (#1274)
* fixes counts as bigint
* fixes Pathways for BQ
* Fixes save of Cohort Definitions when criteria requiring narrower CDM range are added (#1278)
* Fixes timeout based invalidation of Execution Engine jobs (#1272)
* Fixes Impala drivers (#1280)
* Updates circe to newer release which resolves PLE issues on Impala
* Merge fixes