2007-07-17  Vivien Malerba <malerba@gnome-db.org>

        * tests/data-models/check_virtual.c:
        * tests/data-models/city.csv:
        * tests/data-models/country.csv:
        * tests/data-models/check_virtual.csv: test GdaVproviderDataModel and GdaVconnectionDataModel objects
        * configure.in:
        * providers/sqlite/virtual: renamed from providers/sqlite/vproviders plus modifications to make
        it useable as a component of Libgda
        * libgda/Makefile.am:
        * libgda/csv.h:
        * libgda/libcsv.c: embedded libcsv library (http://sourceforge.net/projects/libcsv/)
        * libgda/gda-data-model-import.c: now use the embedded libcsv library to import CSV files
        * libgda/gda-data-model.c: now use the embedded libcsv library to
        export to CSV files
        * samples/Virtual/*: added an example about how to use the GdaVproviderDataModel and GdaVconnectionDataModel
        objects (very similar to the...