v0.1.0-preview

• Initial release of R package version.
• Flexible rectangular starting board generators:
  • df_rect_board_tiles and grid.board_rect_tiles
  • grid.board_rect_cellsand grid.board_rect_points
• Starting board generators for specific games:
  • df_four_field_kono
  • df_nine_mens_morris
  • df_american_checkers
  • df_backgammon
  • df_chaturaji
  • df_cribbage_board and textGrob_cribbage_board for textual annotation
  • df_alice_chess
  • df_fide_chess
  • df_four_seasons_chess
  • df_ultima_chess
  • df_shogi
  • df_tablut
  • df_xiangqi
• Preliminary work on an GameKit class game_kit
• Prototype ruleset/rulebook generators save_ruleset and save_rulebook