rearrange: some configs housecleaning

Move one-time-usage files:
    root/nc_files/foam.ngc,t3.ngc,taskcall.ngc,toolchange-demo.ngc
to the specific config local dir to support working with a deb install (and
reduce clutter by moving non-generic files from root/nc_files)

(note: deb installs:
(         cp root/nc_files/* /usr/share/linuxcnc/ncfiles/
(      and pickconfig creates a link:
(         ~/linuxcnc/nc_files/examples --> /usr/shre/linuxcnc/ncfiles
(so configs that names that work in RIP by referring to nc_files/ by a relative
(symlink will not have the same name in a deb install.  The _lib
(directories are accesible by identical relative links.

General config dir and ini updates:
  specify local files with OPEN_FILE for one-time-usage cases
  replace bogus OPEN_FILE specifiers (null.ngc, ~user/, etc) with ""
  chmod 644 hal,tbl,ini files

Create nc_files/orphans directory to isolate abandoned and superseded .ngc
files after rearrangement (root/nc_files/on_abort.ngc)
----------------------------------------------------------------------------
Specific config dir updates:
sim/gscreen
  changes to make ini files start:
     remove test_postgui.hal and comment-out ini reference
  remove some unused files

sim/touchy/gladevcp
  use symlink for simpockets.tbl

sim/axis/python_demo/*.ini
  edit ini [EMC]MACHINE for more info in titlebar labeling
  add missing sim_mm_test.hal link
  fix SUBROUTINE_PATH to find on_abort in remap_lib
  mv orient.README to orient.txt for display in picker

sim/axis/remap/*
  edit ini [EMC]MACHINE for more info in titlebar labeling
  fix SUBROUTINE_PATH to find on_abort in remap_lib
  add missing symlinks for halfiles and amend ini for local