msvc needs this

flipcoder · flipcoder · commit 2bcfffc00216 · 2016-07-14T21:36:01.000-07:00
diff --git a/kit/kit.h b/kit/kit.h
@@ -1,6 +1,7 @@
 #ifndef UTIL_H_SNIHUCWC
 #define UTIL_H_SNIHUCWC
 
+#include <set>
 #include <memory>
 #include <mutex>
 #include <vector>
