Removed temp file.
Use named routes in controllers.
Routes cleanup.
Moved IssueRelations to IssueRelation::Relations.
Moved javascript include tag to head.
Merged ajax_upload branch (#3957).
Fixed tests.
Fixed notes preview in issue history broken and hidden by a broken test.
Moved max_concurrent_ajax_uploads from settings to configuration.
Rescue Query::StatementInvalid in TimelogController.
