Move std::list<> support from main.cpp into a module, stl_extra.cpp, to better allow for measuring of core compile times / performance.

src/stl_extra.cpp

@@ -0,0 +1,9 @@
+
+#include <chaiscript/chaiscript.hpp>
+#include <string>
+
+
+CHAISCRIPT_MODULE_EXPORT chaiscript::ModulePtr create_chaiscript_module_stl_extra()
+{
+  return chaiscript::bootstrap::list_type<std::list<chaiscript::Boxed_Value> >("List");
+}