res: upload 24bpp bitmaps

sdl-1.2 cannot work with the 4bpp bitmaps used for the ps1 build, so
24bpp equivalents had to be reconstructed from the originals.

res/LICENSE

@@ -14,12 +14,15 @@ worker_se_24.bmp:
     Derived works from worker.png
 
 grass.bmp:
+grass_24.bmp:
     Derived work from Prototyping Tiles.png
 
 cursor.bmp:
+cursor_24.bmp:
     Derived work from pointer.bmp
 
 barracks.bmp:
+barracks_24.bmp:
     Derived work from barracks.zip
 
 gold_mine.bmp:
@@ -27,19 +30,29 @@ gold_mine_24.bmp:
     Derived works from gold_mine.png
 
 gui_bar_left.bmp:
+gui_bar_left_24.bmp:
 gui_bar_mid.bmp:
+gui_bar_mid_24.bmp:
 gui_bar_right.bmp:
+gui_bar_right_24.bmp:
 sel_up_left.bmp:
+sel_up_left_24.bmp:
 sel_up_right.bmp:
+sel_up_right_24.bmp:
 sel_down_left.bmp:
+sel_down_left_24.bmp:
 sel_down_right.bmp:
+sel_down_right_24.bmp:
 sel_mid.bmp:
+sel_mid_24.bmp:
     Derived works from ui_sheet.png
 
 font.bmp:
+font_24.bmp:
     Derived work from sprFont.png
 
 tree.bmp:
+tree_24.bmp:
     Derived work from autumn_pine_tree_tiles.png
 
 acknowledge_01.wav: