- avoid duplicate load of acs-lang
- apm_file loader: ignore directories  www/resources/, catalog/, upgrade/
- apm_file loader: ignore extensions .html .gif .png .jpg .ico .pdf .js .css .xsl .tgz .zip .gz .java .sql
- align implementation of apm_backup_file_p with documentation
- use usual style non-poistional arguments in ad_proc
- use tcl 8.5 operations
- add git to the list of ignored directories for apm loading