Adding FreqSpec and SchedXaction to QOF Removing deprecated QOF date

[Neil Williams]

Log Message:
-----------
Adding FreqSpec and SchedXaction to QOF
Removing deprecated QOF date handling shorthand.
Improved enum as string macro.
Support for INSERT statements in QOF SQL queries.
Doxygen fixes and additions.
Losing the qof/ directory prefix on included QOF files.

Tags:
----
gnucash-gnome2-dev

Modified Files:
--------------
    gnucash:
        ChangeLog
    gnucash/src/app-utils:
        option-util.c
        option-util.h
    gnucash/src/backend/qsf:
        pilot-qsf-GnuCashInvoice.xml
        qsf-backend.c
        qsf-object.xsd.xml
        qsf-xml-map.c
        qsf-xml.h
    gnucash/src/business/business-core:
        gncEntry.c
        gncEntry.h
    gnucash/src/engine:
        FreqSpec.c
        FreqSpec.h
        FreqSpecP.h
        SchedXaction.c
        SchedXaction.h
        gnc-date.c
        gnc-date.h
        gnc-engine-util.h
        gnc-engine.c
        gnc-trace.c
        gw-engine-spec.scm
        kvp_frame.c
        kvp_frame.h
        qof-be-utils.h
        qof.h
        qof_book_merge.c
        qof_book_merge.h
        qofclass.c
        qofgobj.c
        qofgobj.h
        qofid.h
        qofquery-deserial.c
        qofquery-deserial.h
        qofquery-serialize.c
        qofquery-serialize.h
        qofquery.c
        qofquery.h
        qofquerycore.c
        qofquerycore.h
        qofsession-p.h
        qofsession.c
        qofsql.c
        qofsql.h
    gnucash/src/gnome:
        dialog-scheduledxaction.c
        dialog-sxsincelast.c
        druid-loan.c
        top-level.c
    gnucash/src/gnome-utils:
        QuickFill.h
        account-quickfill.h
        dialog-options.c
        gnc-date-edit.c
        gnc-date-format.c
        gnc-date-format.h
    gnucash/src/import-export:
        import-main-matcher.c
        import-match-picker.c
    gnucash/src/register/ledger-core:
        split-register-layout.h
        split-register.c
        split-register.h
    gnucash/src/register/register-gnome:
        datecell-gnome.c