Log Message:
Updated to version 1.0.1.

Pkgsrc changes:
  - Removed unnecessary definitions for TIFF_LIBRARY. Both tiff and png
    libraries can be found automatically.
  - The package supports installation into DESTDIR.
  - patch-aa is now integrated
  - New patch-ab is necessary to get correct permissions for the executable file

Changes since version 1.0:
==========================
- Fixed off by one convolution error and libpng interface to 1.2.8