refactor Linker & add LinkAddr to allow bytecode with partially resolved symbols / symbol-relative addresses

src/vm.rs

@@ -31,6 +31,14 @@ impl VM {
         }
     }
 
+    pub fn load(&mut self, bytecode: Vec< VM_Word >) {
+        let mut addr = 0;
+        for w in bytecode {
+            self.memory[addr] = w;
+            addr += 1;
+        }
+    }
+
     pub fn execute(&mut self, entry: VM_Word) {
         self.inst_ptr = entry;
         while self.execute_step() {}