-DJSONCPP_USE_SECURE_MEMORY=1 for cmake
Add allocator.h to amalgamated header
Test JSONCPP_USE_SECURE_MEMORY in Travis
diff --git a/include/json/version.h b/include/json/version.h
index 6c570a1..dc975ff 100644
--- a/include/json/version.h
+++ b/include/json/version.h
@@ -10,4 +10,11 @@
# define JSONCPP_VERSION_QUALIFIER
# define JSONCPP_VERSION_HEXA ((JSONCPP_VERSION_MAJOR << 24) | (JSONCPP_VERSION_MINOR << 16) | (JSONCPP_VERSION_PATCH << 8))
+#ifdef JSONCPP_USING_SECURE_MEMORY
+#undef JSONCPP_USING_SECURE_MEMORY
+#endif
+#define JSONCPP_USING_SECURE_MEMORY 1
+// If non-zero, the library zeroes any memory that it has allocated before
+// it frees its memory.
+
#endif // JSON_VERSION_H_INCLUDED