organization in the src structure, modification of README

src/USEFUL/basic_examples/example_telnet.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python
+
+
+__author__ = "bt3"
+
+
+from telnetlib import Telnet
+
+
+# examples of telnet connections
+PORT = 12345
+HOST = '54.209.5.48'
+
+# creating connection
+tn = Telnet(HOST ,PORT)
+
+# reading input
+msg_in2 = tn.read_all().dec_msg()
+tn.read_until(b'psifer text: ')
+
+# writing outputs
+tn.write(msg.encode() + b'\n')