Fixed: error while deleting an in-use enumeration (#4970).
Refactor: Moved ApplicationController#attach_files to the Attachment model
Fixes failing tests from r3521
Fixes some context menu links broken by r3478.
Verify issues are updated by HTTP PUT only. Regression from r3486.
Refactor: Decouple building Issue and TimeEntry objects in #issue_update.
Adds a test for not sending email without recipient (#4920).
Fixed: Trac importer creates duplicate wiki records (#4743).
Fixes bottom links placement in issue with associated changesets (#4883).
tagged version 0.9.3
