2008-09-04  Vivien Malerba <malerba@gnome-db.org>

        API improvements and cleanups:

        * Utility functions changes:
          removed gda_value_compare_ext() as it has no real use and is confusing
          renamed gda_value_bcompare() gda_value_differ()
        * GdaDataModel interface changes:
          added a "GError **error" as last argument of gda_data_model_get_value_at () because it's
             the only way of reporting and correctly handling data access errors, and added
             gda_data_model_get_typed_value_at() which gives more control of the returned value
          renamed gda_data_model_get_column_index_by_name() to gda_data_model_get_column_index()
          renamed gda_data_model_get_value_at_col_name() to gda_data_model_get_value_at_column()
        * GdaHolder object changes: added a GError argument to:
          gda_holder_set_value()
          gda_holder_take_value()
          gda_holder_set_value_str()
          gda_holder_set_bind()
        * GdaSet object changes: added a GError argument to gda_set_set_holder_value()
        * GdaDataAccessWrapper changes: removed gda_data_access_wrapper_row_exists() as it was useless

        Misc doc improvements.

svn path=/trunk/; revision=3200