In the journals app, the Issue model is extended
 with a status field. This is published by default,
 but has a draft options such that a journal can be
 created without being shown. Incomplete issues
 can cause errors for visitors, so use the draft status
 if an issue is not "visitor-ready" yet.

The string method is not returning the right
 fields.

Move few constants to a seperate file away from models.
This implies minor edits in other apps relying on
these few constants.