[Seaside] Seaside 2.5a2 on squeak map

[Julian Fitzell]

Hi all, new alpha release on squeak map for your consumption.

Significant changes:

- while in development mode, raise an error if you try to render a 
component that is not in #children (should make help catch these 
problems while developing instead of failing silently in strange ways)
- rename WARenderLoopMain>>root to #createRoot
- many VW compatibility fixes
- Fix #responseForRequest: so that the error handler executes within the 
scope of the WACurrentSession dynamic variable.
- Allow access to the #nativeRequest (ie, the Comanche or VisualWave 
request object) through WARequest.
- Fix basic authentication to challenge for credentials during the 
request handling phase