New :
- Added several permissions :
- `tan.base` | root of player commands and actions
- `tan.base.town`
- `tan.base.town.create` | allow the player to create towns
- `tan.base.town.join` | allow the player to join towns (/tan invite and application)
- `tan.base.town.quit` | allow the player to quit towns
- `tan.base.town.disband` | allow the player to disband towns
- `tan.base.region`
- `tan.base.region.create` | allow the player to create regions
- `tan.base.town.disband` | allow the player to disband regions
- `tan.admin` | root of admin commands
- `tan.server` | root of server commands

- Add unclaim via `/tan map`
- Add placeholder :
- `%tan_player_{username}_have_town%` => TRUE/FALSE if player have a town
- Better update of the config file when updating the plugin

Bug fixes :

- Fixed a bug caused if an external economy plugin was not returning a currency symbol. It will now be replaced by default with $
- Fixed a bug in the latest update that disable territory leader to be able to manage every permission on every role

Other :

- Old permission have been removed and need to be set again