SimpleHome plugin

Changelog v1.2:
- Updater added, those who have the (home.update) permission can update the plugin from ingame.
- AdminCommand: /simplehome update - it will update the plugin if a new version released.
- From now if a line missing from plugin_config.yml file the plugin will automatically add it.
- Added /homeinvite command:
                                      You can invite a player to your default home by: /homeinvite [player name]
                                      To invite a player to your custom home you need to write: /homeinvite [home name] [player name]
                                      If a player want to accept the invite just type: /homeinvite accept