Added forth-level exception handling to repl.

Added exception handling words.

Implemented read-level portion of quasiquote forms.

Updated README.

Very basic macros working.

Implemented (reverse list).

Simplified iterative define expansion.

Allowed recursive define expansion.

Simplified apply.

Apply now linked to procedure instead of symbol.

Added apply primitive and used it to implement append.

Added display primitives.

Added testing code back in.

Nutting out macro issues.

Finished draft macro implementation

Added lookup-macro and make-macro.

Implementing macros.

Added support for variadic compound procedures.

Implemented begin. Added none object for empty returns.

Fixed stack hygiene bug.

Refactor to allow begin.

Updated README.

Added load primitive.

Load now returns result of last expression.

Implemented load word.  (Now just need scheme prim.)

Updated README.

Mark-sweep garbage collection working.

Primitives are now GC-safe.

GC working when invoked between evaluations.

Now need to deal with root objects on the parameter stack.

Debugging GC.

Added OOM check.

Marked compound procedure type as pairlike.

Implemented scaffolding for mark+sweep GC.

Working on GC.

Fixed broken realnum? procedure.

Can now read and print reals.

Working on FP arithmetic.

Working on exception handling.

Fixed TCO bug.

Fixed bug in apply.

Added tail-call optimization.

Implemented compound procedure application.

Added define syntax for procedure generation.

Implemented lambda (and λ)!

Factored out application into apply.

Working on compound procedures.

Primitive fixnum relations working.

Implemented fixnum =.

Fixed cons, set-car! and set-cdr!

Adding pair/list primitives.

Added more primitives.

eatspaces now eats comments

string->number works.

number->string works.

Debugging number->string

Updated README and added license.

Added some type conversion prims.

Added predicate primitives.

Added * and - fixnum primitives

Fixed fixnum detection in parser.

First primitive procedure working!

Completed draft of primitive application.

Adding first primitive procedure.

Tiny refactor.

Added conditionals.

def/set/lookup are working!

Debugging.

Typos

Finished full draft of set/def/lookup support.

Finished core environment definitions.

Working on set!

Added variable lookup.

Adding environments.

Relaxed symbol parsing rules.

Implemented quote.

Started adding support for pre-defined symbols.

Implemented symbols.

Debugging symbol table.

Updated readme.

Working on symbol table lookup

Implementing symbols.

Implemented strings.

Updated readme.

Added readme.

Fixed pair read/print.

Fixing up pair read/print

Almost have pairs in.

First cons cells created!

Finished defer/is.

Added defer/is to support mutual recursion.

Implemented the empty list.

Character parsing works.

Almost done with characters.

Draft character atom implementation.

Better handling of booleans.

Implemented parse index stack.

Input succesfully shifted to read.

Shifting stream input into read.

Small changes.

Turns out we need terminal input to be handled
directly by read.

Output style change.

Booleans implemented.