Implement Event Maps

[sven-n]

Currently no event maps are implemented. Event maps include for example 'Blood Castle' and 'Devil Square'.
Different from the original game we could also change that some of these events do not run in an interval (like once every hour), but every player/party can instantly enter the map whenever they want. They could get an exclusive instance of it, so there are no other parties disturbing. Of course, this can't be done with Player-versus-Player events like 'Chaos Castle'.

• Devil Square
• Blood Castle
• Chaos Castle
• Illusion Temple
• Double Goer

[sven-n]

Update: Event tickets can be created through the chaos machine already. The required items are dropping, too.
Ofc, the events itself are still not implemented yet.

[sven-n]

I think version 0.95d was the first version to include 'Devil Square', so we should start to implement event maps ;-)

[sven-n]

Devil Square is now implemented with #227. However, the game client of version 0.95d has some minor visual flaws when entering and finishing the event. It might not have been finished in this client version yet - if my memory doesn't fool me, webzen didn't introduce it before season 1 in the global servers.

[sven-n]

See #893 for illusion temple