Add shell app, but the command prompt is broken.
diff --git a/contiki-bitbox/Makefile b/contiki-bitbox/Makefile
index 0d8cb45..1094f86 100644
--- a/contiki-bitbox/Makefile
+++ b/contiki-bitbox/Makefile
@@ -11,11 +11,12 @@
 	$(CONTIKI)/apps/calc-dsc.c $(CONTIKI)/apps/calc.c \
 	$(CONTIKI)/apps/editor-dsc.c $(CONTIKI)/apps/editor.c \
 	$(CONTIKI)/apps/processes-dsc.c $(CONTIKI)/apps/processes.c \
+	$(CONTIKI)/apps/shell-dsc.c $(CONTIKI)/apps/shell-gui.c $(CONTIKI)/apps/shell.c \
 	$(CONTIKI)/apps/program-handler.c $(CONTIKI)/ctk/ctk.c \
 	$(CONTIKI)/ctk/ctk-conio.c \
 	$(CONTIKI)/ek/arg.c $(CONTIKI)/ek/ek.c $(CONTIKI)/ek/ek-service.c \
 	$(CONTIKI)/lib/cfs.c $(CONTIKI)/lib/ctk-filedialog.c \
-	$(CONTIKI)/lib/memb.c \
+	$(CONTIKI)/lib/ctk-textentry-cmdline.c $(CONTIKI)/lib/memb.c \
 	$(CONTIKI)/lib/petsciiconv.c $(CONTIKI)/lib/timer.c \
 	lib/textmode/textmode.c \
 	lib/events/events.c \
diff --git a/contiki-bitbox/conf/shell-gui-conf.h b/contiki-bitbox/conf/shell-gui-conf.h
new file mode 100644
index 0000000..45846b0
--- /dev/null
+++ b/contiki-bitbox/conf/shell-gui-conf.h
@@ -0,0 +1,8 @@
+#ifndef __SHELL_GUI_CONF_H__
+#define __SHELL_GUI_CONF_H__
+
+#define SHELL_GUI_CONF_XSIZE 46
+#define SHELL_GUI_CONF_YSIZE 22
+
+
+#endif /* __SHELL_GUI_CONF_H__ */
diff --git a/contiki-bitbox/contiki-main.c b/contiki-bitbox/contiki-main.c
index 4a4b464..81d9a39 100644
--- a/contiki-bitbox/contiki-main.c
+++ b/contiki-bitbox/contiki-main.c
@@ -83,7 +83,7 @@
 	program_handler_add(&editor_dsc,    "Editor",        1);
 	program_handler_add(&calc_dsc,      "Calculator",    1);
 	program_handler_add(&processes_dsc, "Processes",     1);
-	//program_handler_add(&shell_dsc,     "Command shell", 1);
+	program_handler_add(&shell_dsc,     "Command shell", 1);
 	program_handler_add(&about_dsc,     "About Contiki", 0);
 
 	// Call ek_run until everything is initialized. Then, load welcome.prg.