Now this should be complete

Added basic shell and fixed various bugs...now iceos should be
"complete".

kernel/shell/shell.h

@@ -0,0 +1,20 @@
+/**************************************
+ *          iceOS Kernel              *
+ * Developed by Marco 'icebit' Cetica * 
+ *            (c) 2019                *
+ *       Released under GPLv3         *
+ * https://github.com/ice-bit/iceOS   *
+ ***************************************/
+#ifndef _SHELL_H_
+#define _SHELL_H_
+
+#include <stdint.h>
+
+#define bit(n) (1 << (n))
+#define check_flag(flags, n) ((flags) & bit(n))
+
+void helper();
+void processCommand(uint8_t *cmd);
+void iceos_ascii_logo();
+
+#endif