* Fixes#499 and part of #1303.
* Implements Guild Storage Expansion Skill which requires client 2013-12-23 or newer (enable by default depending on client date in src/config/packets.hpp).
* Implements guild storage permission which requires client 2014-02-05 or newer.
* Expanded script command guildopenstorage return values.
IF YOU HAVE A WORKING AND TESTED BUGFIX PUT IT INTO STABLE AS WELL AS TRUNK. EVERYTHING ELSE
GOES INTO TRUNK AND WILL BE MERGED INTO STABLE BY VALARIS AND WIZPUTER. -- VALARIS
git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@5094 54d463be-8e91-2dee-dedb-b68131a5f0ec
