remove enableLog and openOnLan

Add a detector to check whether the server setting changed.

Conflicts:
	shadowsocks-csharp/Controller/Local.cs
	shadowsocks-csharp/Controller/PACServer.cs
	shadowsocks-csharp/Controller/PolipoRunner.cs
	shadowsocks-csharp/Controller/ShadowsocksController.cs
	shadowsocks-csharp/Program.cs
	shadowsocks-csharp/View/ConfigForm.Designer.cs
	shadowsocks-csharp/View/ConfigForm.cs

Add an option to select whether to open log or not.
Add a detector to check whether the server setting changed.

Add an option to choose whether to open on lan or not.

Use QRCode4CS as the QR code generator, which is much more fast

Change the first letter of function to upper case letter to fit C# code
style

Now can use esc key to cancel, and don't change focus after change
server from list

Now can use esc key to cancel, and don't change focus after change
server from list

Add a lock on config form to avoid accidental changes