Add .equals and a limited .compareTo to Function.prototype
Remove .select from ContextualizingDAO, as it breaks optimization of all EXPRs.  Now only objects fetched with .find are contextualized.
Fix export of QIssueCommentDAO from QProject.
Fix "Default values and factories" test broken by new init system.
Make .compareTo return not 0 when the objects have a different model_.