Cashshop support

Since our neighbors were a little earlier with releasing the cash shop system, here is our version of it.
It supports TXT and SQL databases and even features kafra point support.
Don't forget to run your SQL updates, since this feature needs another log table for your own security. ;)

Follow up to r17240 finalizing pincode feature. Should be stable now - no beta anymore. Fixes bugreport:7505

Fixed guild creation bug bugreport:7502

Implemented the new NPC range tid:81303

git-svn-id: https://rathena.svn.sourceforge.net/svnroot/rathena/trunk@17242 54d463be-8e91-2dee-dedb-b68131a5f0ec