AutoOpts

A one-off allocation error that caused rare segfaults was fixed. The headers are now installed into an "autoopts" subdir, separating them from client program include name space. The "for-each" main procedures can now handle the arguments or input lists as file names and call the callback function with the command argument after verifying it is a file, an fopen-ed file pointer to the file, or with a pointer to the contents of the named file.