Difficulty levels

Hi!

It's now possible to choose difficulty levels for the A.I. player. It works for both local and online games, and for the invasion gamemode.

Currently, there is 4 difficulty levels to choose from:

• Easy: less aggressive,  doesn't think very deep when making its decisions like which unit to attack, or which building to build.
• Medium: stronger, but doesn't make use of certain advanced tactics.
• Hard - equivalent to the former A.I. before this update.
• Cheater - as the name implies, it cheats! This level is meant for advanced players seeking a new challenge.