Guile 1.6 is now required for gnucash.

[David Hampton]

Log Message:
-----------
Guile 1.6 is now required for gnucash.  Finish removal of all
functions deprecated in that version.

Tags:
----
gnucash-gnome2-dev

Modified Files:
--------------
    gnucash:
        ChangeLog
        configure.in
    gnucash/src:
        guile-mappings.h
    gnucash/src/app-utils:
        app-utils.scm
        file-utils.c
        gfec.c
        gnc-exp-parser.c
        gnc-helpers.c
        gnc-ui-util.c
        guile-util.c
        option-util.c
    gnucash/src/app-utils/test:
        test-print-queries.c
        test-scm-query-string.c
    gnucash/src/backend/file:
        sixtp-dom-generators.c
    gnucash/src/engine:
        gnc-hooks.c
    gnucash/src/engine/test:
        test-scm-query.c
    gnucash/src/gnome:
        dialog-tax-info.c
        gnc-network.c
        gnc-plugin-page-account-tree.c
    gnucash/src/gnome-utils:
        gnome-utils.scm
    gnucash/src/import-export/qif-import:
        dialog-account-picker.c
        druid-qif-import.c
    gnucash/src/report/locale-specific/us:
        gncmod-locale-reports-us.c
    gnucash/src/report/report-gnome:
        dialog-column-view.c
        dialog-style-sheet.c
        gnc-plugin-page-report.c
        window-report.c
    gnucash/src/report/report-system:
        gnc-report.c