Converting to GModule backends

[Neil Williams]

Log Message:
-----------
Converting to GModule backends

Tags:
----
gnucash-gnome2-dev

Modified Files:
--------------
    gnucash/po:
        POTFILES.in
    gnucash/src/backend/file:
        Makefile.am
        gnc-backend-file.c
    gnucash/src/backend/file/test:
        .cvsignore
        Makefile.am
        test-load-xml2.c
    gnucash/src/backend/postgres:
        Makefile.am
        PostgresBackend.c
        PostgresBackend.h
        kvp-sql.c
    gnucash/src/backend/postgres/test:
        .cvsignore
        Makefile.am
        test-db.c
        test-period.c
    gnucash/src/backend/qsf:
        Makefile.am
    gnucash/src/business/business-core/test:
        Makefile.am
    gnucash/src/engine:
        gnc-engine.c
        qofsession.c
    gnucash/src/gnome-utils:
        Makefile.am
    gnucash/src/gnome:
        Makefile.am
    gnucash/src/import-export/qif-import/test:
        Makefile.am