* moved ChangeLog to 'doc' sundirectory.
  * added support for 'lib' directory
  * corrected ade_std_shell calls (passing "-n $OPT_SIMULATE")
  * links which already exist and are to be removed prior to 
    recreation fixed to all appear on one line (to avoid "rm a b"
    becoming effectively "rm a; b")
  * fixed a missing 'then' on an 'if'
  * added a warming if 'cd' in simulation will fail (because
    simulated mkdir means cd doesn't yet have a directory to
    cd into.
  * switched to using ade_std_shell instead of ade_std_eval which doesn't
    exist in ade (it was only pkglns/ahhg-symlink-package that named the
    function ade_std_eval anticipating it would be imported into ADE)
  * added more ADE interface functions
  * fixed some typos in Usage message
  * reimported two functions stolen from ADE.
  * copied ahhg-symlink-package to pkglns
  * deleted pkglns script to be replaced by ahhg-symlink-package in a moment.
  * Used adegmt to create pkglns.