Nodes can now be shared with /nodes/<node_id>/share endpoint.

A POST will create a short link (if it doesn't exist already), whereas
a GET will return the short link for the node.

The endpoint will return a dict like:

{'short_code': 'XXXXXX',
 'short_link': 'https://blender.cloud/r/XXXXX',
 'theatre_link': 'https://blender.cloud/r/XXXXX?t'}

pillar/config.py

@@ -98,3 +98,6 @@ LOGGING = {
         ],
     }
 }
+
+SHORT_LINK_BASE_URL = 'https://blender.cloud/r/'
+SHORT_CODE_LENGTH = 6  # characters