Add custom QZ Tray fork with pairing key authentication

- Custom fork of QZ Tray 2.2.x with certificate validation bypassed
- Implemented pairing key (HMAC) authentication as replacement
- Modified files: PrintSocketClient.java (certificate check disabled)
- New files: PairingAuth.java, PairingConfigDialog.java
- Excluded build artifacts (out/, lib/javafx*) from repository
- Library JARs included for dependency management

tray/test/qz/ws/substitutions/SubstitutionsTests.java

@@ -0,0 +1,19 @@
+package qz.ws.substitutions;
+
+import org.codehaus.jettison.json.JSONException;
+import org.codehaus.jettison.json.JSONObject;
+
+import java.io.IOException;
+
+public class SubstitutionsTests {
+    public static void main(String ... args) throws JSONException, IOException {
+        Substitutions substitutions = new Substitutions(
+                SubstitutionsTests.class.getResourceAsStream("resources/substitutions.json")
+        );
+        JSONObject base = substitutions.replace(
+                SubstitutionsTests.class.getResourceAsStream("resources/printRequest.json")
+        );
+
+        System.out.println(base);
+    }
+}