First work on delim continuations
Callcc using dc ops
Split compute context into own file.
renamed tail call support file
Split computation ops into own files
Added shift and reset
Cleaning up a bit
Fixed console
Rewrote env ops to use refs instead of computations for environment values.
Cleaning up global stuff
More global cleaning
Using amulet records for a few objects
Eliminated more record code.
Removing more record code.
more record code removal.
Added compute strict again.
Updated amulet.
Moving to use extend instead of declare
More use of extend
Readded breaking tail calls on bind for long running expressions.