add boilerplate for second edition

first_edition/ebook_src/trees/bunchclass.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python
+
+__author__ = "bt3"
+
+class BunchClass(dict):
+    def __init__(self, *args, **kwds):
+        super(BunchClass, self).__init__(*args, **kwds)
+        self.__dict__ = self
+
+
+def main():
+    ''' {'right': {'right': 'Xander', 'left': 'Willow'}, 'left': {'right': 'Angel', 'left': 'Buffy'}}'''
+    bc = BunchClass     # notice the absence of ()
+    tree = bc(left = bc(left="Buffy", right="Angel"), right = bc(left="Willow", right="Xander"))
+    print(tree)
+
+if __name__ == '__main__':
+     main()
+
+
+
+