has way too many things

In short: added the ability to detect when a device has disconnected.
From this we have to achieve a way of:
- reconnecting the device
- re-subscribing to the fields it needs (it should already be subscribed
since the ESDI didn't stop tho - but for the sake of it, or in case a
device joins later)
- start sending data to it (which should be automatic given how we are
handling the devices)

devices/cdashdisplay/display.go

@@ -140,6 +140,14 @@ func NewCDashDisplay() (*CDashDisplay, error) {
 	}, nil
 }
 
+func (cds *CDashDisplay) Close() error {
+	// if cds.WT != nil {
+	// 	cds.Close()
+	// }
+
+	return nil
+}
+
 func (d *CDashDisplay) SendCommand() {
 }