Initial split of the modules

NadekoBot.Modules.Utility/Common/Exceptions/StreamRoleNotFoundException.cs

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+using System;
+
+namespace NadekoBot.Modules.Utility.Common.Exceptions
+{
+    public class StreamRoleNotFoundException : Exception
+    {
+        public StreamRoleNotFoundException() : base("Stream role wasn't found.")
+        {
+        }
+    }
+}

NadekoBot.Modules.Utility/Common/Exceptions/StreamRolePermissionException.cs

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+using System;
+
+namespace NadekoBot.Modules.Utility.Common.Exceptions
+{
+    public class StreamRolePermissionException : Exception
+    {
+        public StreamRolePermissionException() : base("Stream role was unable to be applied.")
+        {
+        }
+    }
+}