Added and applied styles for private readonly fields, private fields to Extensions and Common folders.

- Some renamings and code cleanups
- Chained method calls, binary expressions and binary patterns will now break into newlines
- Type param constraints and base constructor calls will be on the new line

src/NadekoBot/Common/IBotCredentials.cs

@@ -21,7 +21,7 @@ public interface IBotCredentials
     string CoinmarketcapApiKey { get; }
     string CoordinatorUrl { get; set; }
 }
-    
+
 public class RestartConfig
 {
     public string Cmd { get; set; }