Add code to allow the register colors to be set by the system theme (i.e

[David Hampton]

Log Message:
-----------
Add code to allow the register colors to be set by the system theme
(i.e from gtkrc files).  Remove the preferences to set the register
colors.  Add a gconf keys to 1) specify whether to use the gtkrc
colors or the default gnucash colors, 2) display the
horizontal/vertical lines in the register, and 3) set the alternate
coloring mode.

Tags:
----
gnucash-gnome2-dev

Modified Files:
--------------
    gnucash:
        ChangeLog
    gnucash/doc:
        gtkrc-2.0.gnucash
    gnucash/src/app-utils:
        prefs.scm
    gnucash/src/business/business-gnome:
        dialog-invoice.c
        dialog-order.c
        gnc-plugin-page-invoice.c
    gnucash/src/business/business-ledger:
        gncEntryLedger.h
        gncEntryLedgerModel.c
    gnucash/src/gnome:
        gnc-plugin-page-register.c
        gnc-plugin-register.c
        top-level.c
    gnucash/src/gnome/schemas:
        Makefile.am
    gnucash/src/register/ledger-core:
        Makefile.am
        split-register-model.c
        split-register-model.h
        split-register.h
    gnucash/src/register/register-core:
        table-allgui.c
        table-allgui.h
    gnucash/src/register/register-gnome:
        gnucash-grid.c
        gnucash-header.c
        gnucash-item-edit.c
        gnucash-sheet.c
        gnucash-sheet.h
        gnucash-style.c
        gnucash-style.h

Added Files:
-----------
    gnucash/src/gnome/schemas:
        apps_gnucash_general.schemas