Core/Entities: Use ObjectGuid class in game project

sql/updates/characters/2014_09_13_00_characters_groups.sql

@@ -0,0 +1,9 @@
+ALTER TABLE `groups`
+  MODIFY `icon1` BIGINT(20) UNSIGNED NOT NULL,
+  MODIFY `icon2` BIGINT(20) UNSIGNED NOT NULL,
+  MODIFY `icon3` BIGINT(20) UNSIGNED NOT NULL,
+  MODIFY `icon4` BIGINT(20) UNSIGNED NOT NULL,
+  MODIFY `icon5` BIGINT(20) UNSIGNED NOT NULL,
+  MODIFY `icon6` BIGINT(20) UNSIGNED NOT NULL,
+  MODIFY `icon7` BIGINT(20) UNSIGNED NOT NULL,
+  MODIFY `icon8` BIGINT(20) UNSIGNED NOT NULL;