add test for reading a nested quasiquote expression
added test for nested quasiquotes
bind arc_dlist
add arc_dlist
implement list, dlist, and append (required for new version of quasiquote we're working on)
bind append
prototypes
add dlist to builtins
half-finished new version of quasiquote that is #if 0'd (we'll remove that when it's done)
dlist
comment out old def of list (now defined in core arc)