Added code to get the consoles to be split into their own

Fixed issue where exiting a shell would not close the parent console properly
Changed the way the consoles are linked to the processes by making it a pointer to the console
Added all the console changes for the above
Added a slow maze drawing program similar to the c64 version

Makefile

@@ -200,6 +200,7 @@ UPROGS=\
 	_argtest\
 	_screen\
 	_cls\
+	_maze\
 
 fs.img: mkfs $(UPROGS)
 	./mkfs fs.img $(UPROGS)
@@ -223,8 +224,8 @@ QEMUGDB = $(shell if $(QEMU) -help | grep -q '^-gdb'; \
 	then echo "-gdb tcp::$(GDBPORT)"; \
 	else echo "-s -p $(GDBPORT)"; fi)
 ifndef CPUS
-CPUS := 2
-#CPUS := 1
+#CPUS := 2
+CPUS := 1 # For debugging
 endif
 QEMUOPTS = -drive file=fs.img,index=1,media=disk,format=raw -drive file=xv6.img,index=0,media=disk,format=raw -smp $(CPUS) -m 512 $(QEMUEXTRA)