Make root directory an include path, set #include's properly

Easier to write includes now just using < with the module name, in
comparison to using relative paths.

vm/inst.h

@@ -16,8 +16,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-#include "../lib/base.h"
-#include "../lib/darr.h"
+#include <lib/base.h>
+#include <lib/darr.h>
 
 typedef enum
 {

vm/runtime.h

@@ -16,7 +16,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-#include "../lib/base.h"
 #include "./inst.h"
 
 typedef enum