Update graphic and fix some bugs

1.The analog monitor graphic it works now.
2.Support to open the USB device "Testo-345" ,and read it's data.
3.Change the bacnet user interface,make it more  concise.
4.Fix the modbus DLL .If the device disconnected , the  "read_one" and
"write_one" function will error until you connect
again.Now it will automatically reconnect to the device.
5.Support to get the Zigbee RSSI now.
6.Fix the panel number of each device must less than 32 . (now it can
larger than 32)

![2](https://cloud.githubusercontent.com/assets/3907266/2740875/f6301a36-c6dc-11e3-935a-e9cdf58aa437.jpg)
![graphic](https://cloud.githubusercontent.com/assets/3907266/2740876/f66e419e-c6dc-11e3-8e54-6997408fd6dc.jpg)