1999-04-12  Michael Natterer  <mitschel@cs.tu-berlin.de>

        * app/airbrush.c
        * app/bezier_select.c
        * app/blend.c
        * app/brightness_contrast.c
        * app/bucket_fill.c
        * app/by_color_select.c
        * app/clone.c
        * app/color_balance.c
        * app/color_picker.c
        * app/convolve.c
        * app/crop.c
        * app/curves.c
        * app/ellipse_select.c
        * app/eraser.c
        * app/flip_tool.c
        * app/free_select.c
        * app/fuzzy_select.c
        * app/histogram_tool.c
        * app/hue_saturation.c
        * app/ink.c
        * app/iscissors.c
        * app/levels.c
        * app/magnify.c
        * app/move.c
        * app/paintbrush.c
        * app/pencil.c
        * app/posterize.c
        * app/rect_select.[ch]
        * app/text_tool.c
        * app/threshold.c
        * app/transform_tool.c

        * app/tools.[ch]
        * app/toolsF.h: again: all tools :(

        * app/Makefile.am
        * app/tool_options.[ch]
        * app/selection_options.h
        * app/tool_options_ui.h: new files.

        Ok, this time it's general enough for future extensions:

        - The tool options structures are organized like the gtk object
          system to allow derived tool options.
        - Renamed all create and reset functions to *_options_new() and
          *_options_reset() to reflect this.
        - Changed tools_register() again. Now it takes just a pointer to a
          ToolOptions structure.
        - Moved almost the entire tool options gui code to tool_options.c.
        - Visually separated the common selection options from the
          tool-specific ones. I'd like to do the same with opacity/paint
          mode in all paint tool options but I think this needs some more
          discussion.

        * app/histogram_tool.c: changed packing boxes, label alignments.

        * app/paintbrush.c: some more sensitive settings. The gradient
        feature can now be toggled with a button. Hopefully didn't break
        anything.