regxpcom functional changes.

[Doug Turner]

I am getting ready to add some functionality to regxpcom.  Here is the 
listing of new options which I have added.  Please let me know if you 
would like to see any other options or new functionality added.

note - that I haven't landed these changes yet.  I hope to land these 
changes for the 1.4 release.

Usage: regxpcom [options] [file-or-directory]

Options:

-x path

Specifies the location of a directory containing the
xpcom library which will be used when registering new
component libraries. This path will also be added to
the "load library" path. If not specified, the
current working directory will be used.
-c path

Specifies the location of the compreg.dat file. If
not specifed, the compreg.dat file will be in its
default location.
-d path

Specifies the location of the xpti.dat file. If not
specifed, the compreg.dat file will be in its default
location.
-a

Option to register all files in the default component
directories. This is the default behavoir if regxpcom
is called without any arguments.
-h

Displays this help screen.

-u

Option to uninstall the files-or-directory instead of
registering them.
-q

Quiets some of the output of regxpcom