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

src/main.cpp

@@ -40,7 +40,6 @@ int main(int argc, char *argv[]) {
     std::string input;
     chaiscript::ChaiScript chai;
 
-    chai.add(chaiscript::bootstrap::list_type<std::list<chaiscript::Boxed_Value> >("List"));
 
     if (argc < 2) {
         //std::cout << "eval> ";