(+) SEGFAULT handling
(^) new emit / stack semantics
    - cur stack has now lower priority than emits/awaits
(^) u32 for stack
(-) bug in ceu_go_wclock
(^) `finally´ simplified
(^) ns.awaits->ns.lsts_n, ns.tracks->ns.trks_n
(+) `nothing´ is back
(^) emit has higher prio than current trails
    * `ceu_lst_go´ now receives "stack"
(^) new `finalize with´
(^) `:=´ -> `finaize nothing´ // `::=´ -> `:=´
(^) BlockN -> Stmts
(^) rearrange Root/Main/Dcl_cls
(-) bug in `:=´ (missing org)