* important fix for servers with promotion column (#36)

* caused player.vocation to be resetted when saving player, for example:
on change name, accept invite to guild, leave guild
* fixed empty success message on leave guild
* (internal) using $player->getVocationName() where possible instead of
older method
* fixed some warning in guild show

system/templates/characters.html.twig

@@ -385,12 +385,8 @@
 				<td>
 					<nobr>{{ i }}.&#160;{{ player.getName() }}{% if player.isDeleted() %}<font color="red"> [DELETED]</font>{% endif %}</nobr>
 				</td>
-				{% set vocation = 'Unknown' %}
-				{% if config.vocations[player.getVocation()] is defined %}
-					{% set vocation = config.vocations[player.getVocation()] %}
-				{% endif %}
 
-				<td>{{ player.getLevel() }} {{ vocation }}</td>
+				<td>{{ player.getLevel() }} {{ player.getVocationName() }}</td>
 				<td>{% if player.isOnline() %}<b><font color="green">Online</font></b>{% endif %}</td>
 				<td>
 					<table border="0" cellspacing="0" cellpadding="0">