High-level design for future HoTK

[Tong Shen]

This is it. Discussion welcome. The plan is to implement these stuff in the next two release and we are done. By 'done' I mean all that will be left to do are balance changes and small tweaks and art and bugs instead of new concepts. Of course, all of this is mainly my job.

There are something I need to mention: scenarios are the responsibility of xxhe, and the random map script is the responsibility of Khyron. There's no hard deadline for these two. If conditions don't permit you to finish these jobs in a reasonable period of time, feel free to say it, and let's find the solution together.

About the website: I have postponed the construction of the website because I'm not satisfied with HoTK in it's current status. Let's give the world something better.