Removed ZENY_HACKER according to issue 295 (github)
Documented impossible_trade_check
Fixed issue where a crash would occur in mobs with MD_RANDOMTARGET, issue: 8231 http://hercules.ws/board/tracker/issue-8231-server-received-crash-signal/
Fixed partial of the sentence + typo.

Follow up to 2fb3c85
Fixed issue in all skills that used status->get_matk, the function was altering MATK even when was only supposed to get it. It was seamless most of the time because this function is mainly used in flag 2 that doesn't change anything but it was noticeable after using AL_HEAL.
This issue was reported in http://hercules.ws/board/tracker/issue-8235-reply-skills-reduce-attac/
Merge branch 'master' of https://github.com/HerculesWS/Hercules
HPM Hooks Update

Signed-off-by: HerculesWSAPI <Hercules@efficiently.awesome>
Update some wrong item buy price
ItemDB SQL Sync

Signed-off-by: HerculesWSAPI <Hercules@efficiently.awesome>
Fixed 'value computed is not used', issue: 8236 http://hercules.ws/board/tracker/issue-8236-compile-error-in-centos-65-x64/ couldn't test it and this warning doesn't show on MSVC 2010 /W4 if the warning continues to show please use the issue page.
Merge branch 'master' of https://github.com/HerculesWS/Hercules
MAX_NPC_CLASS2_END updated to latest ID. Added more NPC constants.
Fixed issue with Biochemist that resulted in never regaining Bioethics.
Fixed Item DB issues from ae289d6.
ItemDB SQL Sync

Signed-off-by: HerculesWSAPI <Hercules@efficiently.awesome>
Minor fix follow-up to b73a578.
ItemDB SQL Sync

Signed-off-by: HerculesWSAPI <Hercules@efficiently.awesome>
SQL Re-Organization.

Signed-off-by: KeiKun <the.keikun@gmail.com>
Organized sql-tools.
Updated sql-upgrade files.