added more tests and moved some connect4 fn into board
adding pawn promotion test
failed attempt at promotion impl
adding what's needed to pass test
fixes #2 pawn promotion
issue #2 renaming pawn promotion function
Merge branch 'pawn-promotion'
Issue #2 pawn promotion
Conflicts:
	src/zone/lambda/game/chess/core.clj
Issue #3 adding pawn promotion :promote-to  metadata tag to pawn-moves
Issue #5 play-scenario-dbg as debugging helper
Merge branch 'master' of github.com:nabacg/lambda-game-engine into nabacg-master