* pgm/pgmimagesink.c:
        * pgm/pgmimagesink.h:
        Added optional forwarding of motion, pressed and released events to
        the pipeline.
        Added the PgmImageSinkEventMask enum.
        Added the PgmImageSink:events properties of the new
        PgmImageSinkEventMask type.
        Added a getter and a setter for PgmImageSink:events.
        No longer get the object lock on sink in pgm_image_sink_get_image().

        * docs/pgm/pigment-sections.txt:
        * docs/pgm/tmpl/pgmimagesink.sgml:
        Updated documentation.

        * win32/common/libpigment.def:
        Updated definitions.