Added an example for PyQt5 (#389)

* added pyqt5 example

* fixed example path on build

* improved pyqt example

* simplified example

examples/cpp/RemoteTerm/remoteterm.cpp

@@ -0,0 +1,32 @@
+#include "remoteterm.h"
+#include <QTcpSocket>
+#include <QDebug>
+#include <unistd.h>
+
+RemoteTerm::RemoteTerm(const QString &ipaddr, quint16 port, QWidget *parent)
+    : QTermWidget(0,parent)
+{
+    socket = new QTcpSocket(this);
+    
+    // Write what we input to remote terminal via socket
+    connect(this, &RemoteTerm::sendData,[this](const char *data, int size){
+        this->socket->write(data, size);
+    });
+
+    // Read anything from remote terminal via socket and show it on widget.
+    connect(socket,&QTcpSocket::readyRead,[this](){
+        QByteArray data = socket->readAll();
+        write(this->getPtySlaveFd(), data.data(), data.size());
+    });
+    connect(socket, SIGNAL(error(QAbstractSocket::SocketError)),this,SLOT(atError()));
+
+    // Here we start an empty pty.
+    this->startTerminalTeletype();
+
+    socket->connectToHost(ipaddr, port);
+}
+
+void RemoteTerm::atError()
+{
+    qDebug() << socket->errorString();
+}