* app/tools_cmds.c: new file, containes the PDB stuff for most
of the tools

* app/gimprc_cmds.c: new file, PDB interface stuff for gimprc
access

* app/Makefile.am: added tools_cmds.c and gimprc_cmds.c

* app/airbrush.[ch]
* app/blend.[ch]
* app/bucket_fill.[ch]
* app/by_color_select.[ch]
* app/clone.[ch]
* app/color_picker.[ch]
* app/convolve.[ch]
* app/crop.[ch]
* app/ellipse_select.[ch]
* app/eraser.[ch]
* app/flip_tool.[ch]
* app/free_select.[ch]
* app/fuzzy_select.[ch]
* app/gimprc.[ch]
* app/paintbrush.[ch]
* app/pencil.[ch]
* app/perspective_tool.[ch]
* app/rect_select.c app/rect_select.h
* app/rotate_tool.[ch]
* app/scale_tool.[ch]
* app/shear_tool.[ch]: bye bye PDB stuff (exported necessary enums
functions, vars, etc.)

* app/internal_procs.c: use register_foo functions

* app/blend.[ch]: GradientType enum case changed

* app/bucket_fill.[ch]: s/FillMode/BucketFillMode/, made the enum
more consistent

* app/clone.[ch]: capitalized the CloneType enum

* app/color_picker.[ch]: changed get_color to pick_color so we don't
conflict with colormaps.c get_color

* app/convolve.[ch]: capitalized the ConvolveType enum

* app/paint_core.h: made a GradientPaintMode enum

* app/transform_core.h: BoundingBox enum

* app/scale_tool.c: use the generic bounding box enum for X1, Y1, etc.

* app/shear_tool.[ch]: turned HORZ and VERT into a ShearType enum

-Yosh