Core: Easy module conf creation & reload (#931)

* Change the read method of the config of the module.Developers can now easily read the config file in cmake.

e.g. AC_ADD_CONFIG_FILE("${CMAKE_CURRENT_LIST_DIR}/conf/my_first_module.conf.dist")

* Update Master.h

* Update cs_reload.cpp

Command: `.reload config` can now reload the config file of all modules #981

src/server/scripts/Commands/cs_reload.cpp

@@ -315,6 +315,7 @@ public:
     {
         sLog->outString("Re-Loading config settings...");
         sWorld->LoadConfigSettings(true);
+        sWorld->LoadModuleConfigSettings();//reload modules config setting
         sMapMgr->InitializeVisibilityDistanceInfo();
         handler->SendGlobalGMSysMessage("World config settings reloaded.");
         return true;