title: Django-ckeditor file upload doesn't work
body: <p>I use django-ckeditor module in my blog as WYSIWYG editor for create and edit articles in the administration. It work pretty well but I can't upload image to my server. When I click on the image button, the button "browse the server" and "upload image" doesn't appear as they supposed to (I saw it somewhere). I can only add externals images providing their urls.
  I use Django 1.8 with Python 3.4</p>
  
  <p>The module django-ckeditor and ckeditor_uploader are correctly installed and added in the INSTALLED_APP.</p>
  
  <p>This is my settings.py file :</p>
  
  <pre><code>import os
  
  BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
  
  SECRET_KEY = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
  
  DEBUG = True
  
  ALLOWED_HOSTS = []
  
  INSTALLED_APPS = (
      'django.contrib.admin',
      'django.contrib.auth',
      'django.contrib.contenttypes',
      'django.contrib.sessions',
      'django.contrib.messages',
      'django.contrib.staticfiles',
      'blog',
      'ckeditor',
      'ckeditor_uploader',
  )
  
  MIDDLEWARE_CLASSES = (
      'django.contrib.sessions.middleware.SessionMiddleware',
      'django.middleware.common.CommonMiddleware',
      'django.middleware.csrf.CsrfViewMiddleware',
      'django.contrib.auth.middleware.AuthenticationMiddleware',
      'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
      'django.contrib.messages.middleware.MessageMiddleware',
      'django.middleware.clickjacking.XFrameOptionsMiddleware',
      'django.middleware.security.SecurityMiddleware',
  )
  
  ROOT_URLCONF = 'django-mini-blog.urls'
  
  TEMPLATES = [
      {
          'BACKEND': 'django.template.backends.django.DjangoTemplates',
          'DIRS': [],
          'APP_DIRS': True,
          'OPTIONS': {
              'context_processors': [
                  'django.template.context_processors.debug',
                  'django.template.context_processors.request',
                  'django.contrib.auth.context_processors.auth',
                  'django.contrib.messages.context_processors.messages',
                  'django.template.context_processors.media',
              ],
          },
      },
  ]
  
  WSGI_APPLICATION = 'django-mini-blog.wsgi.application'
  
  DATABASES = {
      'default': {
          'ENGINE': 'django.db.backends.sqlite3',
          'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
      }
  }
  
  LANGUAGE_CODE = 'fr-fr'
  
  TIME_ZONE = 'UTC'
  
  USE_I18N = True
  
  USE_L10N = True
  
  USE_TZ = True
  
  STATIC_URL = '/static/'
  
  MEDIA_URL = '/media/'
  
  MEDIA_ROOT = os.path.join(BASE_DIR, 'media')
  
  STATIC_ROOT = os.path.join(BASE_DIR, 'static')
  
  CKEDITOR_UPLOAD_PATH = "uploads/"
  
  CKEDITOR_IMAGE_BACKEND = "pillow"
  </code></pre>
  
  <p>Thanks in advance for your help.</p>
  
  <p>Sincerely,</p>