Bug fixes

Optimized MVP tomb code, thanks ivanyan
http://rathena.org/board/tracker/issue-8159-mvptomb-destroy-not-efficient-code/

Fixed quest status display, thanks reigneil
Credit to malufett
http://rathena.org/board/tracker/issue-7175-bug-in-all-quests/

Fixed @autotrade persistency problems:
Changed truncate to delete
Fixed sex problems