* Enabled "next" and "previous" buttons
* Added corresponding methods to Board
* Added Move#invert()
* Rendering variation count in MoveNodeRenderer
The added functionality does not work correctly at the moment. This is
probably caused due to missing synchronization between the state of the
board, the game and the user interface.
When loading or saving a game file, the file chooser dialog opens inside
the directory that has been last accessed by the user. In case of no
previous access, the home directory is used instead.
Closes#14
+ copyVariations parameter in copy constructors of Board and Log
This procedure still required work in the form of efficiently rewinding
the board to the first position for SAN move extraction and shortening
SAN moves to the smallest possible representation.
+ showFileSaveDialog in DialogUtil
+ Javadoc in Log and PGNDatabase
+ "Save game file" button in MenuBar
+ saveFile method in MainWindow
+ Formatting and result tag in PGNGame tag pair serialization
* Renamed RestartEvent to GameStartEvent
* Moved event trigger to Game
* Renamed GameState to BoardState
* Added BoardState instance to MoveEvent
* Disabling the color switching button when a checkmate or stalemate is
reached
Fixes#1
* Letting a NaturalPlayer select the promotion piece with a combo box
* Optimized reflection use in PawnPromotion
* Changed toString method of Move to use LAN
Closes#9
* Moved move execution and reversion to the Move class
* Removed Move.Type enumeration
* Added Move subclasses Castling, EnPassant and PawnPromotion
* Generating all four possible pawn promotions in the Pawn class
* Temporarily removed special move support from NaturalPlayer
* Removed move counter from Piece
* Added castling right array to MoveNode and Log
* Removed castling right map from Board
* Added castling right serialization and deserialization to FENString
* Modified LogTest
