LDEV-4415 Add tool output weight. Rewrite activity evaluations.
Activity evaluations have been implemented as a list, even though always
only the first element is meaningful. They were rewritten as one-to-one
association with Activity. The primary key is activity ID now instead of
DB generated UID.
Weight column was added.
Server version was bumped so a filter can pick up activityEvaluations ->
evaluation field rename when importing older LDs.
A convention without date was used for server version as it seems good
enough.
Unnecessary versions of clients were removed from configuration table as
they server the abandoned Flash authoring.
