Showing script version.
Added route and method stub for running updates.
Improved semantics of the model classes.
Fixed a bug that would cause an exception to be thrown when processing exceptions that use string codes, like PDOException (which uses alphanumeric SQL error codes):
Added action to run all updates that have not yet been run, or have been altered since the last run. Note that there is a hypothetical special case of scripts that are different from the last recorded run, but have an earlier ctime. Those are interpreted as "outdated", are not included in the run, and there's currently no way to deal with them. This is still a to-do.
Fixed bugs in the timestamp / datetime handling. Those were leftovers from the multiple changes to the semantics of those fields.