Settings: savefrequency is now configurable in launcher

* Client command-line can modify arbitrary settings now
* Only launcher auto-saves to settings.json

include/vstd/StringUtils.h

@@ -0,0 +1,6 @@
+namespace vstd
+{
+
+	DLL_LINKAGE std::vector<std::string> split(std::string s, std::string separators);
+
+}