organization in the src structure, modification of README

src/basic_examples/example_threads.py

@@ -1,16 +0,0 @@
-#!/usr/bin/env python
-
-__author__ = "bt3"
-
-import threading
-
-def worker(num):
-    """thread worker function"""
-    print 'Worker: %s' % num
-    return
-
-threads = []
-for i in range(5):
-    t = threading.Thread(target=worker, args=(i,))
-    threads.append(t)
-    t.start()