Rework template lib

[ikeydoherty]

The template lib is currently fairly primitive, working on an interpret-in-place concept, meaning that advanced child contexts and per-list-context is somewhat shaky.

For better integration into "status" pages and report mechanisms, the template lib should be reworked to compile first, and emit on a second render run.

[ikeydoherty]

Note to self, I have code already in progress for this one.