Map chair skill + Hired Merchant fix

Changed map chair bonus healing mechanic to be a player skill, instead of promptly available for all players (healing buff takes place only if the player has the skill). Hired Merchant now properly checks for a space on the inventory before permitting a player to buy an item/bundle. Minor fix with concurrency on MapleStorage.

src/net/server/channel/handlers/QuestActionHandler.java

@@ -26,7 +26,6 @@ import client.MapleClient;
 import net.AbstractMaplePacketHandler;
 import scripting.quest.QuestScriptManager;
 import server.quest.MapleQuest;
-import tools.MaplePacketCreator;
 import tools.data.input.SeekableLittleEndianAccessor;
 
 /**
@@ -34,6 +33,7 @@ import tools.data.input.SeekableLittleEndianAccessor;
  * @author Matze
  */
 public final class QuestActionHandler extends AbstractMaplePacketHandler {
+    @Override
     public final void handlePacket(SeekableLittleEndianAccessor slea, MapleClient c) {
         byte action = slea.readByte();
         short questid = slea.readShort();