Added license file

python_examples/LICENSE_FOR_EXAMPLE_PROGRAMS.txt

+The intent of the example programs supplied with the dlib C++ library is
+to both instruct users and to also provide a simple body of code they
+may copy and paste from.  To make this as painless as possible all the
+example programs have been placed into the public domain.  
+
+
+This work is hereby released into the Public Domain. 
+To view a copy of the public domain dedication, visit 
+http://creativecommons.org/licenses/publicdomain/ or send a 
+letter to 
+    Creative Commons 
+    171 Second Street 
+    Suite 300, 
+    San Francisco, California, 94105, USA.
+
+
+
+Public domain dedications are not recognized by some countries.  So
+if you live in an area where the above dedication isn't valid then
+you can consider the example programs to be licensed under the Boost
+Software License.   
+