[dev] My Ansel tasks

[Duck]

After the last set of patches I isolated the minimum set of changes to Ansel t
o be usable for my community. I am writing them down to discuss them before I 
start working on them as I think are for general purpose and so suitable to be 
committed.

1.  Automatic watermark of screen images
I will like that if the pref is locked the images are automatically watermarke
d like "user at domain.com". Some prefs for default watermark position will be ad
ded.

2. Offensive content
Galleries soul have the "from age" attribute. A configuration option will be a
dded to specify age classes like in Oscar (no classes - the feature is disable
d) to allow user/editor mark a gallery as a possible offensive content that sh
ould be limited to 18+.

3. Report abuse
Users can report a gallery as a potential offensive content, for copyright in 
fragment ...

4. Limited download full photo
In a community we just publishing our photos. We don't like to see our origina
l camera photos to go around the net. So a configuration option will be added 
that allows the following values/states:
- all - The same as is now
- edit - Only users that have edit permission can access this photos
- hook - Access is granted by a hook, possible to later add the ability to sel
l the image "archive" service

5. Password protected galleries
The user has to have an simple possibility to lock his gallery not by only by 
permissions but also by password. If the pass is set the permissions are reset 
to default and before someone enters the gallery he must enter the password li
ke in Oscar for videos. Is much spliest for a really large user list or to all
ow restricted access for specific guests.

Duck