S7.Net and S7.Net.Core unification (issue #56): moved files, updated csproj, minor modification for compatibility in SocketClient class.

Signed-off-by: Michele Cattafesta <michele.cattafesta@mesta-automation.com>

S7.Net/Enums.cs

@@ -0,0 +1,51 @@
+namespace S7.Net
+{
+    public enum CpuType
+    {
+        S7200 = 0,
+        S7300 = 10,
+        S7400 = 20,
+        S71200 = 30,
+        S71500 = 40,
+    }
+
+    public enum ErrorCode
+    {
+        NoError = 0,
+        WrongCPU_Type = 1,
+        ConnectionError = 2,
+        IPAddressNotAvailable,
+
+        WrongVarFormat = 10,
+        WrongNumberReceivedBytes = 11,
+
+        SendData = 20,
+        ReadData = 30,
+
+        WriteData = 50
+    }
+
+    public enum DataType
+    {
+        Input = 129,
+        Output = 130,
+        Memory = 131,
+        DataBlock = 132,
+        Timer = 29,
+        Counter = 28
+    }
+
+    public enum VarType
+    {
+        Bit,
+        Byte,
+        Word,
+        DWord,
+        Int,
+        DInt,
+        Real,
+        String,
+        Timer,
+        Counter
+    }
+}