nx::shell2: Rewrote in-shell exit support to avoid Tcl's native exit and to unwind gracefully to avoid NSF refcount leaks on exit; bumped package number
nx::shell reform: Provide an alternative nx::shell impl (nx::shell2), used by all four shell scripts. nx::shell2 builds on Tcl's event loop, rather than while + update. This avoids blocking the Tk main window (update). In addition, nx::shell2 is closer to Tcl's native shells (e.g., no extra lines on enter, catches EOF).
- added nxwish.in (scripted replacement for former xowish) - added xotclsh.in (scripted replacement for former xotclsh) - added xowish.in (scripted replacement for former xowish) - added error handling to all scripted shells - removed old xotclsh.in and xowish.in (from apps/utils)