secondaryResource counter (TeraSmartArray / Nibble)

[Cervator]

Or however else it gets stored after the review in #139 (forum: http://board.movingblocks.net/viewtopic.php?f=4&t=173) - point being, I think it would be a great foundation for several advanced systems, like a more complete liquid flow, weather, growth simulation, and the whole idea of secondary resources deep down in the ground, like oils and gasses. And great traps, like aquifers and poisonous gas ;-)

Oddly enough, this is a good independent opportunity for a new contributor to focus on, as it is mostly independent of everything else and not a short-term item. That, and the "state" nibble is actually already there. A full-fledged advanced liquid management system is beyond the scope of this issue, instead this just provides a foundation and a possibility to replace the existing system (the "state" nibble in Chunk.java) along with maybe some proof of concept tinkering

Possible (partial) prerequisites:

• Block Integrity System #137 - Block integrity (which can combine with this to form water pressure)
• Entity System / Tick System to better base processing on (vs main game loop which is likely too fast)

[Cervator]

Closing this as outdated / sort of complete. IIRC we can add per-block data in modules somehow now. In any case this description is waaay out of date since it predates even the entity system.