Remove instruction to pip install Django

CONTRIBUTING.md

@@ -61,7 +61,6 @@ To run the tests, clone the repository, and then:
     # Setup the virtual environment
     python3 -m venv env
     source env/bin/activate
-    pip install django
     pip install -r requirements.txt
 
     # Run the tests

README.md

@@ -77,7 +77,6 @@ Let's take a look at a quick example of using REST framework to build a simple m
 
 Startup up a new project like so...
 
-    pip install django
     pip install djangorestframework
     django-admin startproject example .
     ./manage.py migrate

docs/community/contributing.md

@@ -67,7 +67,6 @@ To run the tests, clone the repository, and then:
     # Setup the virtual environment
     python3 -m venv env
     source env/bin/activate
-    pip install django
     pip install -r requirements.txt
 
     # Run the tests

docs/tutorial/1-serialization.md

@@ -21,7 +21,6 @@ Before we do anything else we'll create a new virtual environment, using [venv].
 
 Now that we're inside a virtual environment, we can install our package requirements.
 
-    pip install django
     pip install djangorestframework
     pip install pygments  # We'll be using this for the code highlighting
 

docs/tutorial/quickstart.md

@@ -14,8 +14,7 @@ Create a new Django project named `tutorial`, then start a new app called `quick
     python3 -m venv env
     source env/bin/activate  # On Windows use `env\Scripts\activate`
 
-    # Install Django and Django REST framework into the virtual environment
+    # Install Django REST framework into the virtual environment
-    pip install django
     pip install djangorestframework
 
     # Set up a new project with a single application

requirements.txt

@@ -6,8 +6,9 @@
 # only included the relevant sets when running tox, and ensures
 # we are only ever declaring our dependencies in one place.
 
--r requirements/requirements-optionals.txt
+-r requirements/requirements-base.txt
--r requirements/requirements-testing.txt
--r requirements/requirements-documentation.txt
 -r requirements/requirements-codestyle.txt
+-r requirements/requirements-documentation.txt
+-r requirements/requirements-optionals.txt
 -r requirements/requirements-packaging.txt
+-r requirements/requirements-testing.txt

requirements/requirements-base.txt

@@ -0,0 +1 @@
+django