readme.md: added link for documentation and removed example that was not compiling.

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

README.md

@@ -9,6 +9,9 @@ I found the library simple and effective, but the project has languished unchang
 I was doing some automation work already and saw a few places where the code base could be improved. Because Juergen did not respond
 to my request for committing code, I decided to pick up where he left off here on GitHub.
 
+## Documentation
+S7.Net Plus has a [User Manual](https://github.com/killnine/s7netplus/blob/master/Documentation/Documentation.pdf), check it out.
+
 ## Supported PLC
 
 + Compatible S7 PLC (S7-200, S7-300, S7-400, S7-1200, S7-1500)
@@ -21,42 +24,6 @@ to my request for committing code, I decided to pick up where he left off here o
 
 PM> Install-Package S7netplus
 
-## Basic Usage
-
-```C#
-//Basic connection properties
-string deviceIpAddress = "172.25.116.87";
-int rackNumber = 0;
-int slotNumber = 2;
-
-//Connection to device
-using (var plc = new PLC(CPU_Type.S7300, deviceIpAddress, rackNumber, slotNumber))
-{
-	//Ensure IP is responding
-    if (plc.IsAvailable)
-    {
-        ErrorCode connectionResult = plc.Open();
-
-		 //Verify that connection was successful
-        if (connectionResult.Equals(ErrorCode.NoError))
-        {
-            //Get data
-            object data = plc.Read("MB59");
-
-            Console.WriteLine("SUCCESS: Read result of MB59 is {0}", data);
-        }
-        else
-        {
-            Console.WriteLine("ERROR: Device is available but connection was unsuccessful!");
-        }
-    }
-    else
-    {
-        Console.WriteLine("ERROR: Device is not available!");
-    }
-} 
-```
-
 ## Running the tests
 
 Unit tests use Snap7 server, so port 102 must be not in use.