[1.8.x] Updated tutorial to use explicit relative imports.

Backport of b2f331dc68 from master

docs/intro/tutorial02.txt

@@ -113,7 +113,8 @@ file, and edit it to look like this:
     :filename: polls/admin.py
 
     from django.contrib import admin
-    from polls.models import Question
+
+    from .models import Question
 
     admin.site.register(Question)
 
@@ -193,7 +194,8 @@ the ``admin.site.register(Question)`` line with:
     :filename: polls/admin.py
 
     from django.contrib import admin
-    from polls.models import Question
+
+    from .models import Question
 
 
     class QuestionAdmin(admin.ModelAdmin):
@@ -221,7 +223,8 @@ up into fieldsets:
     :filename: polls/admin.py
 
     from django.contrib import admin
-    from polls.models import Question
+
+    from .models import Question
 
 
     class QuestionAdmin(admin.ModelAdmin):
@@ -248,7 +251,8 @@ aren't commonly used:
     :filename: polls/admin.py
 
     from django.contrib import admin
-    from polls.models import Question
+
+    from .models import Question
 
 
     class QuestionAdmin(admin.ModelAdmin):
@@ -277,7 +281,8 @@ with the admin just as we did with ``Question``. That's easy:
     :filename: polls/admin.py
 
     from django.contrib import admin
-    from polls.models import Choice, Question
+
+    from .models import Choice, Question
     # ...
     admin.site.register(Choice)
 
@@ -310,7 +315,8 @@ registration code to read:
     :filename: polls/admin.py
 
     from django.contrib import admin
-    from polls.models import Choice, Question
+
+    from .models import Choice, Question
 
 
     class ChoiceInline(admin.StackedInline):

docs/intro/tutorial03.txt

@@ -94,7 +94,7 @@ In the ``polls/urls.py`` file include the following code:
 
     from django.conf.urls import url
 
-    from polls import views
+    from . import views
 
     urlpatterns = [
         url(r'^$', views.index, name='index'),
@@ -209,7 +209,7 @@ Wire these new views into the ``polls.urls`` module by adding the following
 
     from django.conf.urls import url
 
-    from polls import views
+    from . import views
 
     urlpatterns = [
         # ex: /polls/
@@ -296,7 +296,7 @@ commas, according to publication date:
 
     from django.http import HttpResponse
 
-    from polls.models import Question
+    from .models import Question
 
 
     def index(request):
@@ -374,7 +374,7 @@ Now let's update our ``index`` view in ``polls/views.py`` to use the template:
     from django.http import HttpResponse
     from django.template import RequestContext, loader
 
-    from polls.models import Question
+    from .models import Question
 
 
     def index(request):
@@ -406,7 +406,7 @@ rewritten:
 
     from django.shortcuts import render
 
-    from polls.models import Question
+    from .models import Question
 
 
     def index(request):
@@ -436,7 +436,7 @@ for a given poll. Here's the view:
     from django.http import Http404
     from django.shortcuts import render
 
-    from polls.models import Question
+    from .models import Question
     # ...
     def detail(request, question_id):
         try:
@@ -471,7 +471,7 @@ provides a shortcut. Here's the ``detail()`` view, rewritten:
 
     from django.shortcuts import get_object_or_404, render
 
-    from polls.models import Question
+    from .models import Question
     # ...
     def detail(request, question_id):
         question = get_object_or_404(Question, pk=question_id)

docs/intro/tutorial04.txt

@@ -73,7 +73,7 @@ create a real version. Add the following to ``polls/views.py``:
     from django.http import HttpResponseRedirect, HttpResponse
     from django.core.urlresolvers import reverse
 
-    from polls.models import Choice, Question
+    from .models import Choice, Question
     # ...
     def vote(request, question_id):
         p = get_object_or_404(Question, pk=question_id)
@@ -225,7 +225,7 @@ First, open the ``polls/urls.py`` URLconf and change it like so:
 
     from django.conf.urls import url
 
-    from polls import views
+    from . import views
 
     urlpatterns = [
         url(r'^$', views.IndexView.as_view(), name='index'),
@@ -254,7 +254,7 @@ views and use Django's generic views instead. To do so, open the
     from django.core.urlresolvers import reverse
     from django.views import generic
 
-    from polls.models import Choice, Question
+    from .models import Choice, Question
 
 
     class IndexView(generic.ListView):

docs/intro/tutorial05.txt

@@ -170,7 +170,8 @@ Put the following in the ``tests.py`` file in the ``polls`` application:
     from django.utils import timezone
     from django.test import TestCase
 
-    from polls.models import Question
+    from .models import Question
+
 
     class QuestionMethodTests(TestCase):