Fixes an occasional crash on launch

• Uses the Metal graphics API instead of OpenGL
• Updates the game from 32-bit to 64-bit
• Fixes a number of minor issues

• Fixes a bug which caused the AI to not sell stock when low on money
• Fixes an occasional crash on launch

• Improves interface of the pre-game Options window.
• Removes functionality for connecting the game to a Game Center account.
• Removes functionality for online play through a Game Ranger account.
• Fixes a number of minor issues.

Fixes a number of minor issues.