Remove unused global options code.

[David Hampton]

Log Message:
-----------
Remove unused global options code.  Global options are now all stored
in gconf.

Tags:
----
gnucash-gnome2-dev

Modified Files:
--------------
    gnucash:
        ChangeLog
    gnucash/src/app-utils:
        Makefile.am
        app-utils.scm
        gw-app-utils-spec.scm
        prefs.scm
    gnucash/src/gnome-utils:
        dialog-options.c
        dialog-options.h
    gnucash/src/scm:
        main.scm

Removed Files:
-------------
    gnucash/src/app-utils:
        global-options.c
        global-options.h