Created mingw64 makefile, removed gif keys from example game

Author: SlithyMatt

example/mygame_z1_level1.xci

@@ -13,7 +13,6 @@ sprite_frames 4  0  40     # Rear of car
 sprite 4  102 170          # Parked, not moving
 sprite_frames 1  0  6
 sprite 1  148 170
-gif_start
 end_anim
 
 tool_trigger look  18 21  19 22

example/mygame_z2_level0.xci

@@ -40,7 +40,6 @@ tool_trigger use  20 16  21 18
 if near_izzys
 sprite_frames 1  0  9
 wait 30
-gif_pause
 go_level 2 1
 end_if
 if_not near_izzys

sdk/Makefile.mingw

@@ -0,0 +1,15 @@
+ALL_OBJS = $(patsubst %.c,%.o,$(wildcard *.c))
+ALL_HDRS = $(wildcard *.h)
+
+all: $(ALL_OBJS) $(ALL_HDRS)
+	x86_64-w64-mingw32-gcc -o xci.exe $(ALL_OBJS)
+%.o: %.c
+	x86_64-w64-mingw32-gcc -c $< -o $@
+
+clean:
+	rm -f xci.exe $(ALL_OBJS)
+
+test: bitmap_test
+
+bitmap_test: bitmap.h bitmap.c
+	x86_64-w64-mingw32-gcc -o bitmap.exe -DTEST bitmap.c