Start cleaning up editor code.
Better setup for substitution.
Setting up for core type checking.
Getting there ...
Basic functionality restored.
Better highlighting.
Mid re-organization
Rough substitution.
Before thinking about a major rewrite.
Oh god.  A terrible dead-end.
Reorganize directory structure.
Trim back editor files.
Compiling. Lot's o' work left ...
Added identifiers
More expression crap.
Added frameworks
Abstract worksheets
Worksheet and framwork implementations
Progress is slow but steady
A bit more ...