CachedPixmaps added as pixmap folder

The CachedPixmap folder is added to the icon list. This is because
if one icon is created, but the user change it and set other icon, the first
icon cannot be selected anymore using the settings window. The user
needs modify the configuration files by hand.

Some extra paths are added to the debian default config file.

WindowMaker/Defaults/WindowMaker.in

@@ -14,6 +14,7 @@
     "#pkgdatadir#/Pixmaps",
     "/usr/include/X11/pixmaps",
     "~/GNUstep/Library/WindowMaker/Pixmaps",
+    "~/GNUstep/Library/WindowMaker/CachedPixmaps",
     "/usr/share/icons",
     "/usr/local/share/pixmaps",
     "/usr/share/pixmaps"
@@ -21,6 +22,7 @@
   PixmapPath = (
     "~/GNUstep/Library/WindowMaker/Pixmaps",
     "~/GNUstep/Library/WindowMaker/Backgrounds",
+    "~/GNUstep/Library/WindowMaker/CachedPixmaps",
     "#pkgdatadir#/Pixmaps",
     "#pkgdatadir#/Backgrounds",
     "/usr/include/X11/pixmaps",