Separate upgrades and achievements from the game-template.

[DainDwarf]

I like what I did with the buildingFactory, it is much clearer than the achievements in game-template.

Reuse that same idea for upgrades and achievements.

This may signify the end of game-template, as universe/empire/settings creation is more or less trivial.

Also take the time to go over some already done unit tests (building factory, upgrade/achievement utils) the loading part could be simplified.