Add destination coords to the nodes table for robots.

	alter table nodes add destination_x float NOT NULL default '0';
	alter table nodes add destination_y float NOT NULL default '0';

Unlike other coords, these are meters and translated to pixels
later when displayed (trying to head in the right direction ...)

sql/database-create.sql

@@ -1161,6 +1161,8 @@ CREATE TABLE nodes (
   battery_percentage float default NULL,
   battery_timestamp int(10) unsigned default NULL,
   boot_errno int(11) NOT NULL default '0',
+  destination_x float NOT NULL default '0',
+  destination_y float NOT NULL default '0',
   PRIMARY KEY  (node_id),
   KEY phys_nodeid (phys_nodeid),
   KEY node_id (node_id,phys_nodeid),

sql/database-migrate.txt

@@ -2420,3 +2420,11 @@ last_net_act,last_cpu_act,last_ext_act);
 	  config tinytext,
 	  PRIMARY KEY  (name,building,floor)
 	) TYPE=MyISAM;
+
+1.309: Add destination coords to the nodes table for robots.
+
+	alter table nodes add destination_x float NOT NULL default '0';
+	alter table nodes add destination_y float NOT NULL default '0';
+
+       Unlike other coords, these are meters and translated to pixels
+       later when displayed (trying to head in the right direction ...)