2000-05-29  Sven Neumann  <sven@gimp.org>

        * app/Makefile.am
        * app/paint_core.c
        * app/paint_core_kernels.h: moved brush subsampling kernels
        into its own header file and generated a slightly different
        kernel (using the new kernelgen tool, see below). The new
        kernel simulates a circular brush instead of a rectangular
        one and gives slightly different (lighter) results.

        * app/gimage_mask.c: when stroking a selection, offset the
        points by 0.5 to align the brushes with the pixel grid. This
        lets you create 1-pixel wide rectangles and ellipses.

        * tools/Makefile.am
        * tools/kernelgen.c: simple hack to generate subsampling
        kernels.