updated comments in files created by `django-admin.py startproject mysite`
polls.models: modified fields of 'Choice'
-renamed field 'choice' to 'choice_text'
-set default value of 'votes' to 0
changed URLs configuration, reversing and hardcoding:
-root urls: set namespace 'polls' for pattern "/polls/"
-polls.templates: replaced hardcoded urls with template tag 'url'
-polls.urls: set name for all patterns; referenced view functions directly, not as strings
replaced usage of shortcut 'render_to_response' with 'render'
polls: pulled out the class-based views from the urls definition to module 'views'