core/utils.py:  Added 'mangle=True' to the call to slimit inside the `minify()` function.  It doesn't appear to slow down anything by much.
core/utils.py:  Fixed a bug with Python 3 where `entry_point_files()` was throwing an exception trying to sort the imported Python modules.
core/server.py:  Fixed a bug in `ApplicationWebSocket.authenticate()` where it was throwing exceptions in Python 3 trying to decode the origin attribute.