Added serial port support

- complete restructure of codebase

MewtocolNet/PublicEnums/PlcVarType.cs

@@ -0,0 +1,20 @@
+using System.Text;
+
+namespace MewtocolNet {
+
+    public enum PlcVarType {
+
+        BOOL,
+        INT,
+        UINT,
+        DINT,
+        UDINT,
+        REAL,
+        TIME,
+        STRING,
+        WORD,
+        DWORD
+
+    }
+
+}