kernel print and mem

src/kernel.c

@@ -1,5 +1,7 @@
-int main(void)
+#include "print.h"
+
+void init(void)
 {
-    *(char*)0xb8000 = 'A';
-    return 0;
-}
+    print_init();
+    print("Starting nub-os\n", VGA_FG_WHITE, VGA_BG_BLACK);
+}