Useful non-standard words

Depend partially on internal design decisions.


git-svn-id: svn://svn.code.sf.net/p/amforth/code/trunk@1505 fd1c0b69-5d68-47f5-910c-86182ebb6ecd
Compilable Version.

Added some docu.


git-svn-id: svn://svn.code.sf.net/p/amforth/code/trunk@1506 fd1c0b69-5d68-47f5-910c-86182ebb6ecd
Merge branch 'hq'