Merge pull request #503 from janisozaur/include-guards

Add missing include guards

Version.h

@@ -1,3 +1,5 @@
+#pragma once
+
 namespace GameConstants
 {
 extern const char GIT_SHA1[];

include/vstd/StringUtils.h

@@ -1,3 +1,5 @@
+#pragma once
+
 namespace vstd
 {