create continuation_t
rename DT_CONT -> DT_CONTINUATION
add create?continuation
add continuation to arguments of evaluate/apply/native function
added check for continuation to apply_proc
change members of continuation_t
add and use create_empty_continuation()
create continuation in evaluate()
create continuation in apply_proc
added applying of continuation
added call/cc
fixed ignoreing force_return_flag in evaluate()
fixed bug in applying a continuation
support continuation in begin
support continuation in define and set!
support continuation in if
avoid unneeded evaluation of arguments of tokusyu-keisiki
now apply_proc() copy the data before writing force_return_flag
support continuation in and/or
now p_data increment sansyo_count of new data before decrementing sansyo_count of old_data