CoapPacket

- Added stub `orderOptions()` type which will re-order the current options and then return a new re-ordered array for encoding properly
- Added stub `encodeOption(CoapOption)` which returns the encoded option as a `ubyte[]`
- `getBytes()` has stub code to call `orderOption()`, iterate over itsm items and call `encodeOption()` on each

source/doap/protocol/packet.d

@@ -89,6 +89,10 @@ public class CoapPacket
         }
 
         // FIXME: Add options encoding
+        foreach(CoapOption option; orderOptions())
+        {
+            encoded ~= encodeOption(option);
+        }
 
         // Set the payload marker
         encoded ~= PAYLOAD_MARKER;
@@ -99,6 +103,20 @@ public class CoapPacket
         return encoded;
     }
 
+    // TODO: Make public in the future
+    private static ubyte[] encodeOption(CoapOption option)
+    {
+        // TODO: Implement this
+        return [];
+    }
+
+    private CoapOption[] orderOptions()
+    {
+        // TODO: Implement ordering here
+        return this.options;
+    }
+
+
     public void setType(MessageType type)
     {
         this.type = type;