fix #55

This reverts commit ad00a8e3.

http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=17214&keyword=&tag=-1

Added EFFECT_TRIPLE_TRIBUTE

This reverts commit dd955dba.

This reverts commit 3a95a668.

cards affected by EFFECT_FORBIDDEN should be sent to grave instead when
returning to field

Single EFFECT_SET_BASE_ATTACK should reset single attack-assigning effects.

get_attack_target()
classified into 2 categories:
1.attacker=pcard
2.otherwise
The main differences are attack counts and EFFECT_ATTACK_ALL counts.

confirm_attack_target()
Now battle step replay rule will use this function instead.

data in root directory should have a higher priority

暂且先回了，编个相对正常的realease

load script from expansions/script/