since Crate JDBC v1.12 that supports to set a `strict` mode (default:
false) to be compliant with the JDBC spec. This prevents from throwing
an UnsupportedFeatureException if `autocommit(false)` is called.

update clj-time to 0.12.0, add a bunch more unit tests for parameters date range calculationsa along with a couple fixes.

use a buffer for the log instead of an unbound list, move the endpoint into /api/util for simplicity and limit it to superuser access.