Merge branch 'tutorial01'
Add admin.py, admin.site.register(Poll)
customize the admin form, add PollAdmin class
Add fieldsets
Add 'classes': ['collapse']
admin.site.register(Choice)
Add ChoiceInline
admin.StackedInline -> admin.TabularInline
list_display = ('question', 'pub_date', 'was_published_recently')
add attributes to Poll, add list_filter to PollAdmin
Add search_fields = ['question'] to PollAdmin
Add date_hierarchy = 'pub_date' to PollAdmin
customize the admin look and feel
Merge branch 'tutorial02'