Format for Help file

Subjects headings must start on the first character after a line feed or carrige return.
Subject content must have a space character after every LF or CR. These spaces are not
shown when the help file is viewed.
Links to subjects within the help file have [] braketing them. These brakets are not shown
when the help file is viewed and the link is added to the "See Also" menu ( a maximum of 20
per subject area).
Call the help file from the program either from a menu with Menu_Help_Proc() and the dp
field set to (void*)"subject" or with a direct call to Get_Help("subject").  If the subject
is NULL, the first help subject is shown, usually the contents with base links to all the
other subjects. Credits, disclaimers, conditions of use could all be placed in the help
file, though they would be open to change by the users.
