Add the removing of a jail via the ``/jail delete`` command.

src/main/java/com/graywolf336/jail/JailManager.java

@@ -73,6 +73,16 @@ public class JailManager {
 		if(n) plugin.getJailIO().saveJail(jail);
 	}
 	
+	/**
+	 * Removes a {@link Jail}.
+	 * 
+	 * @param name of the jail to remove
+	 */
+	public void removeJail(String name) {
+		this.jails.remove(name);
+		plugin.getJailIO().removeJail(name);
+	}
+	
 	/**
 	 * Gets a jail by the given name.
 	 *