refactoring TCP class + update documentation

Author: DantSu

README.md

@@ -151,7 +151,7 @@ The code below is an example to write in your activity :
 new Thread(new Runnable() {
     public void run() {
         try {
-            EscPosPrinter printer = new EscPosPrinter(new TcpConnection("192.168.1.3", 9300), 203, 48f, 32);
+            EscPosPrinter printer = new EscPosPrinter(new TcpConnection("192.168.1.3", 9300, 15), 203, 48f, 32);
             printer
                 .printFormattedText(
                     "[C]<img>" + PrinterTextParserImg.bitmapToHexadecimalString(printer, getApplicationContext().getResources().getDrawableForDensity(R.drawable.logo, DisplayMetrics.DENSITY_MEDIUM)) + "</img>\n" +
@@ -397,6 +397,13 @@ Easy way to get the first bluetooth printer paired / connected.
 Get a list of bluetooth printers.
 - **return** `BluetoothConnection[]`
 
+### Class : `com.dantsu.escposprinter.connection.tcp.TcpConnection`
+
+#### Constructor : `TcpConnection(String address, int port[, int timeout])`
+- **param** `String address` : Targeted ip address
+- **param** `int port` : Targeted tcp port
+- **param** `int timeout` *(optional)* : Connection timeout.
+
 ### Class : `com.dantsu.escposprinter.connection.usb.UsbPrintersConnections`
 
 #### **Static** Method : `selectFirstConnected()`

escposprinter/src/main/java/com/dantsu/escposprinter/connection/tcp/TcpConnection.java

@@ -13,7 +13,7 @@ public class TcpConnection extends DeviceConnection {
     private Socket socket = null;
     private String address;
     private int port;
-    private int timeout = 0;
+    private int timeout;
 
     /**
      * Create un instance of TcpConnection.
@@ -22,9 +22,7 @@ public class TcpConnection extends DeviceConnection {
      * @param port    Port of the device
      */
     public TcpConnection(String address, int port) {
-        super();
-        this.address = address;
-        this.port = port;
+        this(address, port, 30);
     }
 
     /**
@@ -69,10 +67,6 @@ public TcpConnection connect() throws EscPosConnectionException {
             e.printStackTrace();
             this.disconnect();
             throw new EscPosConnectionException("Unable to connect to TCP device.");
-        } catch (SocketTimeoutException e) {
-            e.printStackTrace();
-            this.disconnect();
-            throw new EscPosConnectionException("Unable to connect to TCP device; exceeded timeout limit.");
         }
         return this;
     }