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/channel/handlers/EnterMTSHandler.java

@@ -74,6 +74,7 @@ public final class EnterMTSHandler extends AbstractMaplePacketHandler {
         chr.cancelDiseaseExpireTask();
         chr.cancelSkillCooldownTask();
         chr.cancelExpirationTask();
+        chr.cancelQuestExpirationTask();
         
         chr.saveToDB();
         chr.getMap().removePlayer(c.getPlayer());