* WIP
* Amend tests
* Do not load aggregated stats for packs
* Add option to host lite
* Fix remaining TODOs
* Fix osquery_utils tests
* Fix SQL
* Fix SQL (bis)
* Restore AuthenticateHost to load once
* Code improvements and re-add deferred host save
* More fixes to the PR
* Wrap users table update on tx
* Add caching to ListPacksForHost and ListScheduledQueriesInPack
* Remove SaveHostSoftware (replaced by UpdateHostSoftware)
* Add unit tests for new functionality
* Add changes file
* Fix scheduled queries test
Notable refactoring:
- Use stdlib "context" in place of "golang.org/x/net/context"
- Go-kit no longer wraps errors, so we remove the unwrap in transport_error.go
- Use MakeHandler when setting up endpoint tests (fixes test bug caught during
this refactoring)
Closes#1411.