Start of "production videos", a.k.a. tagged assets overview

Tagged assets are shown in a list per tag. The list is dynamically
loaded with JavaScript.

cloud/__init__.py

@@ -41,6 +41,7 @@ class CloudExtension(PillarExtension):
             'EXTERNAL_SUBSCRIPTIONS_MANAGEMENT_SERVER': 'https://store.blender.org/api/',
             'EXTERNAL_SUBSCRIPTIONS_TIMEOUT_SECS': 10,
             'BLENDER_ID_WEBHOOK_USER_CHANGED_SECRET': 'oos9wah1Zoa0Yau6ahThohleiChephoi',
+            'NODE_TAGS': ['animation', 'modelling', 'rigging'],
         }
 
     def eve_settings(self):

cloud/routes.py

@@ -391,6 +391,11 @@ def privacy():
     return render_template('privacy.html')
 
 
+@blueprint.route('/production')
+def production():
+    return render_template('production.html')
+
+
 @blueprint.route('/emails/welcome.send')
 @login_required
 def emails_welcome_send():

cloud/tagged/__init__.py

@@ -0,0 +1,3 @@
+"""Routes for fetching tagged assets."""
+
+

cloud/tagged/routes.py

@@ -0,0 +1,16 @@
+import logging
+import datetime
+import functools
+
+from flask import Blueprint, jsonify
+
+blueprint = Blueprint('cloud.tagged', __name__, url_prefix='/tagged')
+
+log = logging.getLogger(__name__)
+
+
+@blueprint.route('/')
+def index():
+    """Return all tagged assets as JSON, grouped by tag."""
+
+