Synchronising with TW fork

Changes mainly to improve integration with ECCS plus some cosmetics on the entities database interface

database/2.6.3-2.6.4.sql

+# Run this when updating from version 2.6.2 to 2.6.3
+
+ALTER TABLE `eccs_stat` ADD `update_date` DATE DEFAULT NULL;
+ALTER TABLE `entity_details` ADD `eccs_status_date` DATE DEFAULT NULL;
+