Converts OS4 icons to PNG retaining tooltypes and default tool.

Example:
 icon2png FROM=disk.info TO=ram:image.png

If the destination is directory the source file name is automatically used
with the destination.

Pattern matching is supported, for example "icon2png FROM=HD0:#? TO=RAM:"
converts icons from HD0: to RAM:.

By default only the first image is converted. If you want DualPNG
icons or you wish to use only secondary image you can use MODE option:

 - STANDARD (use the first image only - default)
 - DUAL (use both images)
 - SINGLE2 (use only the second image)

At the moment only GlowIcons32 format is supported.

Other information like icon position, drawer dimensions etc. is removed.

PERMISSION  UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP     NAME
---------- ----------- ------- ------- ------ ---------- ------------ ----------
[generic]                 4524    4648  97.3% -lh5- 100c Nov 28 23:56 icon2png.info
[generic]                 5369   10772  49.8% -lh5- a827 Nov 29 00:12 icon2png/icon2png
[generic]                  501     899  55.7% -lh5- e764 Nov 29 00:15 icon2png/icon2png.readme
[generic]                 7180    7320  98.1% -lh5- b0b0 Nov 28 23:57 icon2png/icon2png.readme.info
[generic]                 1457    4194  34.7% -lh5- 0e58 Nov 29 00:12 icon2png/pngicon_specs.h
---------- ----------- ------- ------- ------ ---------- ------------ ----------
 Total         5 files   19031   27833  68.4%            Nov 28 21:41