Create polyglot book from pgn file

[fsmosca]

• Create Polyglot dir
• Create PGN dir
• Save polyglot.exe and manual in polyglot dir
• Add Tools menu
• Add "Create Book" sub-menu under Tools menu
• Create a new window for Create Book
• Add class BuildBook()
  • Add init with pgn file located at PGN dir
  • Add create_book() method