Dispatcher implementation and render interface

Introduced dispatched - process that connects field to renders.
Dispatcher can handle multiple renders. Implemented local render.
Cleaned up main, moved all lifecycle logic into dispatched and field
generation into fieldgen.
first approach of remote render, game and server. gob-refactoring ahead
added corpse and nop agent to gobs
capitalized agent and unit
capitalized field and gamestate
capitalized cells
added unit on field fixing after remote unpacking
remote render actually work