Clean-up of Windows icon.

I was noticing some color banding in the task switcher icon in
Windows, and found out that converting the BMP to 256 colors seemed to
fix it. While I was at it, I also cleaned up the edges a little bit on
both that BMP file and also the WBM used for the cutout. I was just
editing the files that came with the install of Wings RC3, so new
versions of those are attached.

[I updated the wings_icon_small.psd file to match those changes. /Bjorn]

Author: Benjamin Burnett

NOTES

@@ -1,3 +1,7 @@
+--- 1.0 ---------------------------------------------------------------------
+- Gordo eliminated some color banding in the task switching icon on Windows
+  and also cleaned up the edges on that icon. [bjorng]
+
 --- 1.0.rc3 -----------------------------------------------------------------
 - The icon in the top left corner of the Wings windows (in Windows) and in
   the Dock (on Mac OS X), now has transparency. I have also added a README