added panel around the chessboard
Refactored Piece creation. Alls pieces on the chessboard are now created, only the Bishop being visible for now.
Merge branch 'develop' of https://github.com/NPTricky/ccd-colon-colon into develop
Added correctly scaled piece images and automatic loading in the PieceFactor, according to Player and PieceType
checkstyle and dokumentation
put the unblockable variable into a movepattern.

thus only full movement patterns are jumps/unblockable, not a few single unblockable motions within a movement pattern. it made no sense.
Merge branch 'develop' of github.com:NPTricky/ccd-colon-colon into develop.movement_system
convenient string within the player enum.

might be used as an easy way to name a player.
valid movement system as good as complete.

cleaned up some imports.