refactoring and minor changes

msql_acces.h

@@ -14,6 +14,8 @@ public:
   msql_acces();
   std::string get_passwd(std::string username);
   std::list<std::string> get_pinfo();
+  void write_install(std::string package, std::string user);
+  void write_remove(std::string);
 private:
   sql::Connection *con;
   sql::Driver *driver;