* When casting a spell with cast time shorter than aMotion, the delay will now be set to aMotion or min_skill_delay_limit
* aMotion and min_skill_delay_limit are no longer applied at cast end nor by auto spells
* Aftercast delay can only increase the delay and never decrease it
* When there is no aftercast delay, the client will no longer show a non-existent 10 second delay
* Removed "double cast" code of Jupitel and Waterball, it's no longer needed as it fits into the official delay system
* Added a constant SECURITY_CASTTIME, which is added at cast begin and subtracted at cast end to prevent hackers to send in skill packets before the timer triggers cast end
* Set skill_amotion_leniency to 0 by default as it applies delay at cast end and would consequently block the official system from working; you can set it back to 90 or even 140 for increased security