Mines for All

- New server commands: - clearallexplosives: Removes all explosives from the server. - giveexplosives [PLAYER] [QUANTITY]: Gives a player a certain number of explosives (default: 1). - takeexplosives [PLAYER] [QUANTITY]: Takes from a player a certain number of explosives (default: 1). - takeallexplosives [PLAYER]: Takes all explosives from a player. - checkexplosives [PLAYER]: Checks how many explosives a player has. - Added block restrictions in order to make the plugin more consistent. - Vault plugin is now an optional dependency. If not installed, /buyexplosives and /sellexplosives will be disabled. - Added an update checker to let the users know when a new version is available. - Settings update (config.yml): - If you put "buyPrice" a negative value, players won't be able to buy explosives. - If you put "sellPrice" a negative value, players won't be able to sell explosives.