Updated dewata to match the official scripts.

This commit includes a optional SQL upgrade file, that will reset all the dewata quests and the related variables, that your users have done.

Thanks to Euphy for helping me and additionally thanks to Flaid for taking his time to test our conversion.

git-svn-id: https://rathena.svn.sourceforge.net/svnroot/rathena/trunk@17178 54d463be-8e91-2dee-dedb-b68131a5f0ec