AI Specialization with mega product classes.

[tonyacx]

The core idea is to restrict the AI competitors to specializing only in the defined "Mega Product Classes", instead of individual classes.

Fashion (mega class)
Food and Beverage (mega class)
Healthcare and Beauty (mega class)
Electronics and Appliances (mega class)
Luxury Goods (mega class)
Software (mega class)
Food Service (mega class)
*Semi Products (mega class) = this mega class could be allowed for anyone

... more mega classes could be added for better game coverage.

Therefore, there's no need to have more than 80-100 AIs in the game for greater competitiveness.