In for a penny, in for a pound

I've talked about script support for AgileWiki3, even supporting scripts within Descriptor Sections (DSects). But if we want to run scripts atomicly, AND WE DO, then there is little choice but to support real nested transactions. (Nested transactions in eariler versions of AgileWiki were really just single-level transactions--there was a lot of missing functionality.

This looks like a good time to address this issue, starting with the caching logic. Sounds like fun.

Bill