Added BApplication::Signature() getter.

src/kits/app/Application.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright 2001-2014 Haiku, inc. All rights reserved.
+ * Copyright 2001-2015 Haiku, inc. All rights reserved.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
@@ -964,6 +964,13 @@ BApplication::IsLaunching() const
 }
 
 
+const char*
+BApplication::Signature() const
+{
+	return fAppName;
+}
+
+
 status_t
 BApplication::GetAppInfo(app_info* info) const
 {