encodings/ directory added

work on Image.GIF begun

Rev: src/modules/Image/Makefile.in:1.6
Rev: src/modules/Image/colortable.c:1.9
Rev: src/modules/Image/colortable.h:1.1
Rev: src/modules/Image/configure.in:1.3
Rev: src/modules/Image/doc/Image.colortable.html:1.3
Rev: src/modules/Image/doc/Image.html:1.9
Rev: src/modules/Image/doc/Image.image.html:1.12
Rev: src/modules/Image/encodings/Makefile.in:1.1
Rev: src/modules/Image/encodings/configure.in:1.1
Rev: src/modules/Image/encodings/gif.c:1.1
Rev: src/modules/Image/encodings/gif_lzw.c:1.1
Rev: src/modules/Image/encodings/gif_lzw.h:1.1
Rev: src/modules/Image/image.c:1.48