Move the gconf helper routines to the code-utils directory.

[David Hampton]

Log Message:
-----------
Move the gconf helper routines to the code-utils directory.  Clean
up the usage of these functions.  Document the functions with doxygen.

Tags:
----
gnucash-gnome2-dev

Modified Files:
--------------
    gnucash:
        configure.in
    gnucash/src/business/business-gnome:
        Makefile.am
    gnucash/src/business/dialog-tax-table:
        Makefile.am
    gnucash/src/core-utils:
        Makefile.am
    gnucash/src/gnome:
        dialog-commodities.c
    gnucash/src/gnome-search:
        Makefile.am
    gnucash/src/gnome-utils:
        Makefile.am
        gnc-tree-view-common.c
        gw-gnome-utils-spec.scm
    gnucash/src/import-export/hbci:
        Makefile.am
    gnucash/src/import-export/ofx:
        Makefile.am
    gnucash/src/import-export/qif-import:
        Makefile.am
    gnucash/src/report/report-gnome:
        Makefile.am

Added Files:
-----------
    gnucash/src/core-utils:
        gnc-gconf-utils.c
        gnc-gconf-utils.h

Removed Files:
-------------
    gnucash/src/gnome-utils:
        gnc-gconf-utils.c
        gnc-gconf-utils.h