Update Introductory Tutorial to work with Alpha 15

[Erik Johansson]

I played through the Introductory tutorial, and noticed the below bugs:

When the tutorial AI said I should have enough buildings to upgrade to the Town Phase I didn't (I had built two houses, one Storehouse, one Farmstead, and one Outpost), doesn't the Outpost count as a required structure or something? Either way that's probably something that would need to be reflected elsewhere as well, but I'll wait with creating another ticket until someone has confirmed it's not just something with this scenario.

The Barracks is now available in the Village Phase (not really a bug with the scenario, just something that might be taken into account when updating it).

The gatherer limit of farms is not taken into account, so if you follow the instructions you end up with idle female citizens.

The Infantry Training technology isn't available in the Barracks, nor in the Blacksmith for that matter as it's got another name now, but in any case the tutorial should be updated to reflect these things (i.e. tell player to build Blacksmith, change name of the technology the player is requested to research).