Bug Fixes
* Fixed Shield Spell not being able to be casted. Can now be casted even with skill_unconditional permission while wearing no shield. (bugreport:9198)
* Fixed divest chance of Earth Strain to official. (bugreport:8999)
* Cleaned up ATK and WATK calculation for some skills to only work in pre-renewal.
* Fixed Magnum Break not giving 20% Fire property damage. (bugreport:9199)
Enhancement to a if else... sounds better I guess
* Fixed bugreport:9211. Basilica causes map-server crashed when caster changing map
* Some source docs for skill.c/h

Signed-off-by: Cydh Ramdh <house.bad@gmail.com>
Bug Fixes
* Fixed mouse cursor displaying incorrectly for PvP scenarios. Thanks to Napster. (bugreport:8605)
* Fixed summons getting stuck when master gets too far off screen or changes maps. (bugreport:9152)
* Added a battle_config 'spawn_direction' for keeping a  character's face direction when teleporting/changing maps/logging in. Default is always North (official). (bugreport:8754)
* Cast sensor mobs should always target the caster whenever any skill is used. (bugreport:8555)
* Added a packet version check to char_del_option based on client date. (bugreport:8521)
* Script command query_sql will now return -1 on an empty result or failed result. (bugreport:5937)
Merge branch 'master' of https://github.com/rathena/rathena
Merge pull request #94 from anubisK/else_correction

Follow up to adabedb. Preprocessor cleanup.
Script bug fixes.
- Added Renewal location for "Knight De Thomas" NPC (previously inaccessible), and upgraded the script to the latest version.
- Fixed Pre-Renewal Merchant Quest questlog commands. (bugreport:9218)
http://rathena.org/board/tracker/issue-9218-merchant-quest-add-error-quest-add-1010/
- Corrected a handful of 'rand(1)' statements.

Signed-off-by: Euphy <euphy.raliel@rathena.org>