new module and some tweaks

mod/battery

@@ -0,0 +1,17 @@
+# vim: ft=ruby
+
+class Battery < Worker
+	require 'open3'
+
+	def mainloop()
+		while true do
+			Open3.popen2("acpi") {|i,o,t|
+				self.write(o.gets.split[3])
+			}
+
+			sleep(10)
+		end
+	end
+end
+
+Modules.add("battery", "Battery")