fix #171: fix compilation problems

Author: laurentpeters

lib/src/main/java/ua/naiksoftware/stomp/dto/StompHeader.java

@@ -8,6 +8,7 @@ public class StompHeader {
     public static final String VERSION = "accept-version";
     public static final String HEART_BEAT = "heart-beat";
     public static final String DESTINATION = "destination";
+    public static final String SUBSCRIPTION = "subscription";
     public static final String CONTENT_TYPE = "content-type";
     public static final String MESSAGE_ID = "message-id";
     public static final String ID = "id";

lib/src/main/java/ua/naiksoftware/stomp/pathmatcher/SubscriptionPathMatcher.java

@@ -1,10 +1,18 @@
 package ua.naiksoftware.stomp.pathmatcher;
 
+import ua.naiksoftware.stomp.StompClient;
 import ua.naiksoftware.stomp.dto.StompHeader;
+import ua.naiksoftware.stomp.dto.StompHeader.*;
 import ua.naiksoftware.stomp.dto.StompMessage;
 
 public class SubscriptionPathMatcher implements PathMatcher {
 
+    private final  StompClient stompClient;
+
+    public SubscriptionPathMatcher(StompClient stompClient) {
+        this.stompClient = stompClient;
+    }
+
     @Override
     public boolean matches(String path, StompMessage msg) {
        // Compare subscription