Polishing for pre-release

- reformatted NaCl pages, HTML readme & CSS style updated
- all builds for Linux, Windows and PNaCl build & work
- regular font colour changed
- misc bugfixes
AI scripts++

- matrix
  * Object::BELOW_BIT cleared on each tick
- lua
  * oz*BindOverlaps exclude subject (Struct, Object)
  * bugfixes in API
  * new AI scripts, everything as automata
    + beasts shoot if a non-beast comes too close
    + knights hunting everything non-knight
    + goblins attack if someone catches them