CRAFT_CONFIG_PATH not picked up
A plugin that has config settings can provide the default values for those settings in plugins/pluginHandle/config.php.

Since you've defined CRAFT_PLUGINS_PATH as craftdevplugins, that would be craftdevplugins\pluginHandle\config.php.

End users can set can set custom values in config/pluginHandle.php.  Since you've defined CRAFT_CONFIG_PATH as craftdevconfig, that would be craftdevconfig\pluginHandle.php.