Added stage 3

Split the plot pixel part of the main function into its own function
Changed the add to a arithmetic shift left
Fixed comment error on the number of colors

stage2/bootasm2.S

@@ -159,7 +159,7 @@ cons_line_loop_start:
 
 cons_line_loop_next_point:
     movw    err(%bp), %ax    # Load err into ax so that we can change it
-    add     %ax, %ax         # e2 is 2 * err, so we can just add err to itself
+    sal     %ax              # e2 is 2 * err, so we can do an arithmatic shift left
 
 cons_line_loop_move_y_point:
     movw    deltay(%bp), %bx
@@ -197,7 +197,7 @@ real_start:
     call    cons_writeline
 
 draw_start:
-    # Set the Video mode to VGA 320 x 200 x 8    
+    # Set the Video mode to VGA 320 x 200 x 256    
     movb    $0, %ah
     movb    $0x13, %al
     int     $0x10