[Seaside] Persistence options for Seaside

[Stephan Eggermont]

There is now a page on persistence at:
http://www.seaside.st/documentation/persistence

I'd like to thank Ramon Leon, James Foster, James Robertson,
Göran Krampe, Keith Hodges, Chris Muller Adriaan van Os for their  
valuable
contributions.

Please send me (or to the list)
- comments
- other possible solutions
- other scenario's
- other questions that are relevant to make a good decision
  - sample code
- information on reference implementations
- links
- answers to the questions in the doc.

Stephan