Search for images within sub-directories of the theme's directory.

[Towheed Mohammed]

The following components:
1. image
2. progress_bar, and

3. circular_progress

have the 'theme_dir' property.  A theme designer can use this property to place 
image files within sub-directories of the theme's directory.  However, 
00_header searches for images only in the theme's directory:


        if [ x"`echo "$themedir"/*.jpg`" != x"$themedir/*.jpg" ] || [ x"`echo 
"$themedir"/*.jpeg`" != x"$themedir/*.jpeg" ]; then
                cat << EOF
        insmod jpeg
        EOF
         fi
         if [ x"`echo "$themedir"/*.png`" != x"$themedir/*.png" ]; then
                cat << EOF
        insmod png
        EOF
         fi
         if [ x"`echo "$themedir"/*.tga`" != x"$themedir/*.tga" ]; then
                cat << EOF
        insmod tga
        EOF
         fi

Please modify 00_header so that it will search for image files within 
sub-directories of the theme's directory.


Thank you.

Towheed Mohammed