Add special variables for keyword arguments & values.
Add support for keyword arguments to (simplify-apply).
Implement full string parsing in src/reader.rls.
TODO: Support keywords in (simplify-lambda) and writer.
Fix assertion in gc_object_left_behind() to work in Gen-0 collection.
Add (weak-box?) and (make-weak-box) primitives. (unbox) now works for both.
Add option to just simplify the input (stops before reduce-function).
Default to writing .rla without indentation, comments, or newlines.
Add support for (fix=), (list), (and), (or), (cond), (when), and (unless).
Fix a mapper bug which could assign the same frame var to separate variables.
Update make-struct primitive for new structure type layout.
Change primitives to use #% as prefix instead of just %.
Add primitive operations for comparing byte-strings.
Pairs, boxes, and strings are hashed by values; vectors and structures
are "hashed" by reference. Takes into account the possibility of cycles.
This is a prelude to implementing hash-tables.
Should simplify error-handling and sequences of primitive tests.
Also, automatically instantiate templates used in the tail-call lambda & cont'n fields.
This is to separate the three 'call' parameters (target, argv, ctx) from
the 'return to' parameter (k). The old order made it look as if the dynamic
context was in some way related to the continuation, which is not the case.
Fix tree_replace() to handle recursive data structures.
Fix some other minor bugs in the reader and interpreter.
Implement comment-escapes in the string parser, for more readable input.
Allow input program files (*.rla) to be invoked directly, with arguments.
Add a simple string->number converter as a builtin function.
Jesse D. McDonald