cubicweb #473067 display hg changest ids w/ vid=info in development mode [open]

when run in development mode from the source forest, display the hg changeset IDs instead of the cubes' version number. If the changeset is a tag, display the tag name.

priorityminor
typeenhancement
done in<not specified>
load0.500
load left0.500
closed by<not specified>