Add dfmc-management hooks for live visualization
remove useless comments
Add tracing to dfmc-optimization passes

Extended the already existing system with logging via a callback function.
While being there, doing some side effects in inlining to make the
visualization happy.
Add dfmc tracing commands to environment

This makes use of dylan-foundry's serialization library
(which can serialize to json or sexpressions)
Maintain visualization flags for projects
Add tracing facility to release notes