Added an example for PyQt5 (#389)

* added pyqt5 example

* fixed example path on build

* improved pyqt example

* simplified example

examples/cpp/RemoteTerm/README.md

@@ -0,0 +1,8 @@
+A simple example showing how to use QTermWidget to control and display a remote terminal.
+
+To run this example, you should: 
+1. Build client-side program. In my PC, I use 'apt-get' to install the QTermWidget library.
+2. Start the shell-srv.py with specific paramenters.This will expose a shell via socket.
+3. Start the client-side program from commandline with specific paramenters.
+
+Now you will get your own remote terminal work with QTermWidget.