Core/Account: Add total time played in account (#1003)

This saves the total time played on the account, even if your characters have been deleted.

data/sql/updates/pending_db_auth/rev_1534268747940576100.sql

@@ -0,0 +1,4 @@
+INSERT INTO version_db_auth (`sql_rev`) VALUES ('1534268747940576100');
+
+ALTER TABLE `account` 
+ADD COLUMN `totaltime` int(10) UNSIGNED NOT NULL DEFAULT 0 AFTER `recruiter`;