Any .i file in this directory will be sourced upon Yorick startup using
include_all by /usr/lib/yorick/i-start/zzdebian.i (this include_all is not
recursive).

Contains currently:
 20usrlocal.i : adds a local hierarchy under /usr/local for all paths:
  /usr/local/lib/yorick/{i,contrib,i0} are added to the include path (.i files);
  /usr/local/lib/yorick/lib is added to the library path (.so files);
  /usr/local/lib/yorick/g is added to GISTPATH (.gs & .gp files).

Subdirectories can contain configurations for specific tasks. Currently,
/etc/yorick/packages contains a specific pkg_setup.i that configures
pkg_mngr.i to install non-debianized packages under the /usr/local tree.
/etc/yorick/packages/pkg_setup.i will be taken into account only if the local
system administrator has not removed the link
/usr/lib/yorick/packages/pkg_setup.i pointing to it.

