Multiplayer, research chains and Linux support

Added new research chains (Monster vs Militia) and Ubuntu support.

The Monster chain includes basically game ending units, while the militia line is far cheaper.

Also changed production chains, so that all buildings are now in the same network. Should make the smoother on cost of perfromance on large maps.

Added housing limits to permit mass militia armys

The multiplayer will stay online!

Rules of the multiplayer:

Every 15 turns,  a new story can be selected. This provides boosts to specific builds, but is limited to generic upgrades for now. Will be expanded in the future.

Every 10 turns, you will encounter a new enemy. You have to select troops from you army to fight the enemy. Your army will be uploaded, so that future players will encounter it (Note: The army position will not be uploaded, units will be placed according to attack range and type).

Select your unit positions at the start of battle, and start the combat. From here on it is a continouus auto battler.

Every lost troop in battle is lost forever.

After the battle, you will receive loot for every killed troop. This will be placed in your depot(s).

You win the game by winning 8 Stages. You loose the game be loosing 4 Stages.

If you are the first person playing this stage, you will encounter a dummy army consisting of 2 Linebreakers and 1 Ballista.

Test it out!

Yes, the multiplayer concept is similiar to Super Auto Pets! It is a great idea from a indie game dev perspective, since it needs minimal ressources to work properly. Also, it's fun.