Updated piece images and front page image.
Merge pull request #156 from jmccormi/new_piece_images

New piece images
Moving dragNdrop package from ChessCrafterShared to ChessCrafterDesktop
Issue #152 Refactoring the Piece class to remove the ImageIcon dependency

Piece icons are not part of the logic of the game so they should be the responsibility of the Desktop project, not the Shared project
Minor code and comment cleanup (no behavior change)
Issue #118 Adding GSON jar to the eclipse project and build script
Refactoring the ChessTimer classes to remove Swing dependencies
Merge branch 'upstream/master'