merge battery applet from Sebastian Reichel

git-svn-id: http://tint2.googlecode.com/svn/trunk@73 121b4492-b84c-0410-8b4c-0d4edfb3f3cc

src/panel.h

@@ -14,6 +14,7 @@
 #include <pango/pangocairo.h>
 #include <sys/time.h>
 
+#include "battery.h"
 #include "common.h"
 #include "clock.h"
 #include "task.h"
@@ -77,6 +78,10 @@ typedef struct {
    // clock
    Clock clock;
 
+	// --------------------------------------------------
+	// battery
+	Battery battery;
+
 } Panel;