Major schedules & DB refactor

Refactored many calls for TimerManager's schedules throughout the source.
Switched all tables using MyISAM to InnoDB: on a multi-threaded environment such as this, table-locking is an instant no-no, and other gains MyISAM would have over InnoDB are minimal.
Altered getConnection() to properly throw an exception (good practice!) in case of no available connection instead of a mere null.

src/net/server/handlers/login/CharSelectedWithPicHandler.java

@@ -26,9 +26,7 @@ public class CharSelectedWithPicHandler extends AbstractMaplePacketHandler {
             return;
         }
         if (c.checkPic(pic)) {
-            if (c.getIdleTask() != null) {
-                c.getIdleTask().cancel(true);
-            }
+            Server.getInstance().unregisterLoginState(c);
             c.updateLoginState(MapleClient.LOGIN_SERVER_TRANSITION);
 
             String[] socket = Server.getInstance().getIP(c.getWorld(), c.getChannel()).split(":");