Read - only access to questionnaire

[charlotte]

Give users read only access to all modelling centres in the questionnaire.  Users only have write access to the test area and to their own modelling centre.

[charlotte]

We talked at coffee time about how to make use of middle-ware functionality to solve this.

[gerry]

At the moment, I have a script which will wipe the contents of the example centre and replace it with a copy of Mark Elkingtons questionnaire instance. In the short term we can use this to clean up the example centre should people enter their own info, but we will want to move to an actual read-only system soon. This is not possible through the urls only as the same urls can be used to control viewing a page and editing a page. In this case we may need to look at the HTTP response and use POST/GET to configure the security layer.