explicitly represented in an fltype_t struct, and symbolic
types are hash-consed. a lot of code is smaller and simpler
as a result. this should allow more features in less space
(both code and data) going forward.
changing \DDD and \x escape sequences to read bytes instead of
characters
re-fixing uint64 cast bug
adding Paul Hsieh's hash function, to be evaluated later
some cleanup
moving some library code around for size optimization
now using == instead of flt_equals for float comparison, mostly
for hash compatibility
fixnums still have 30 bits
moving towards making "guest functions" more opaque; their type is now
just 'builtin
pretty printing some forms better: defun, defmacro, for, label
support *print-pretty*